Does AI Authenticate Paintings?

No, it doesn’t.

AI cannot authenticate a painting or determine the authenticity of an artwork.

Can AI Help Me Authenticate My Painting?

Yes. AI is a quick and powerful art research tool.

Instead of checking one website after another to try to find the information you are looking for, AI can find it quickly for you.

AI does the searching that you used to have to do manually and that used to take hours when researching an artwork.

Is AI Sufficient for Art Authentication?

No. AI is not sufficient to complete an art authentication.

You will have to date the materials used in the painting. AI cannot do it for you.

If you are looking for information that has not been digitized and is therefore not on the Web, you will need to consult archives and go to libraries in person as part of the authentication process.

If you want to see what is below the epidermis of the painting, you will have to get X-rays and infrared photos.

If you want to check if your painting has been restored or if it was signed long after it was painted, you will need to get ultraviolet (UV) photos.

What does it mean that a painting was authenticated “beyond a reasonable doubt”?

It means there is no single piece of evidence proving that the artist painted the work, but the overall evidence makes it highly certain that the painting is authentic.

For example, the painting may be a portrait of the artist’s wife, child, mother, or even a pet, created in the same style and period known for the artist’s work.

It may also depict an interior or subject closely connected to the artist, or be a composition supported by existing drafts, sketches, or studies that match the artist’s known techniques and style.

How is “beyond a reasonable doubt” determined in art authentication?

All supporting evidence must be carefully examined and weighed during the authentication process.

This can include comparing the painting with confirmed photographs, verified artworks, known artistic techniques, materials, dates, and historical records associated with the artist.

The style, technique, materials, and timeline must all be consistent with the artist’s documented body of work and period.

Should you try to authenticate your painting this way?

Yes, especially when the painting appears to present a strong and convincing case for authentication based on the available evidence.

The complete case should be reviewed by evaluating all available components and supporting evidence to determine whether the painting can be authenticated beyond a reasonable doubt.

What does it mean that a painting has been authenticated “by default”?

A painting is authenticated “by default” when experts determine that no other artist could reasonably have created the work.

For example, there is a painting in Washington DC widely accepted as the work of Leonardo da Vinci because there is no other plausible artist who could have painted it.

In this type of authentication, the conclusion is reached by eliminating all other possible artists until only one remains.

Is it difficult to authenticate a painting by default?

Yes. This method requires carefully eliminating every other possible artist and explaining why the work cannot belong to anyone else.

The research must demonstrate why the painting matches only one artist’s style, technique, materials, and historical context.

The amount of work involved depends on the artist and the specific period of the artist’s career.

Which artists can sometimes be authenticated by default?

Artists with highly distinctive styles or techniques may sometimes be authenticated this way. Examples can include Leonardo da Vinci, Wassily Kandinsky, and other artists whose works are uniquely recognizable.

Can you help authenticate a painting by default?

Yes. The process involves reviewing all available details about the painting and evaluating why it can only reasonably be attributed to a specific artist.

How long does authentication by default take?

Authentication by default may take several weeks depending on the complexity of the research and the number of possible artists that must be examined and excluded.

What is a Compositional Analysis?

A compositional analysis examines how an artist organizes and uses space within a painting.

Once an artist decides what to paint, many compositional choices must be made, including placement, balance, perspective, proportions, and the amount of space surrounding the subject.

For example, in a portrait, the artist decides how closely the subject fills the canvas, whether the work will show only the head, a bust, a three-quarter view, or a full-length figure.

In landscapes, the artist chooses the viewpoint, such as an elevated perspective, eye-level view, or a lower angle used to emphasize certain elements like waterfalls or architecture.

A compositional analysis in art authentication compares these spatial decisions in the painting being examined with known authenticated works by the same artist.

Is a Compositional Analysis useful for authenticating my painting?

Yes. Along with style and technique, the way an artist structures and uses space can provide highly valuable information during the authentication process.

Artists often develop recognizable compositional habits and patterns that can help support attribution.

How long does a Compositional Analysis take?

A compositional analysis for art authentication usually takes a few days, depending on the complexity of the artwork and the amount of comparative research required.

What consistency factors are examined in a painting?

Painting Style

If the painting is dated, the style should match the artist’s known style during that specific period.

If the painting is not dated, the style should still fit logically within the artist’s artistic timeline and development.

Style and Subject

The style should be consistent with how the artist typically painted the same or similar subjects.

Painting Technique

The technique used in the painting should correspond with the methods and materials the artist used during the inscribed or estimated period.

Technique and Subject

The painting technique should match the artist’s known approach when working on comparable subjects.

Subject Matter

The subject should align with themes and topics the artist was known to paint during the estimated time period.

Location

If the location shown in the painting can be identified, it should correspond with places where the artist lived, traveled, or worked during that time.

Wear and Tear

The aging and condition of the painting should be appropriate and believable for a work of its claimed age.

Format

The overall format and presentation should match the artist’s known preferences for similar works.

Dimensions

The size and proportions should be consistent with dimensions the artist commonly used for similar subjects.

Support

The support material, such as canvas, wood panel, or paper, should match materials the artist used during the relevant period.

Tacking Pattern

The placement and spacing of tacks or nails can help determine whether the canvas preparation is consistent with the artist’s working methods.

Origin of Art Supplies

The materials and supplies used in the painting should be consistent with the geographic location where the artist lived or worked at the estimated date.

Is it important that all these elements are consistent?

Yes. In art authentication, an authentic painting is expected to remain consistent with the artist’s known habits, materials, techniques, timeline, and working practices without major contradictions or discrepancies.

What is a Critical Mass authentication?

Critical Mass authentication is a method used in art authentication when there is no single clear or direct proof that a painting is authentic.

Instead of relying on one decisive piece of evidence, the authentication is based on multiple supporting elements that all point toward the same conclusion.

When enough consistent and convincing factors are gathered together, they create a “critical mass” of evidence strong enough to support the authenticity of the painting.

What elements can contribute to a Critical Mass authentication?

Many different factors can contribute to a Critical Mass authentication, including:

Use of materials consistent with the artist’s known works, matching dimensions, similar subject matter, corresponding painting style, comparable technique, a credible signature, plausible provenance, and related sketches or preparatory studies.

Additional historical, technical, stylistic, and scientific evidence may also strengthen the overall authentication case.

Should you pursue a Critical Mass authentication?

Yes, especially if direct proof of authenticity is unavailable but multiple positive indicators consistently support attribution to the artist.

Critical Mass authentication can be an effective approach when the combined evidence strongly supports the painting’s authenticity.

How long does a Critical Mass authentication report take?

A Critical Mass authentication report generally takes approximately thirty days, depending on the complexity of the case and the amount of research required.

All available evidence, documentation, technical details, and supporting information are carefully reviewed and weighed before preparing the final authentication report.

Is it rare for a painting to be on a copper plate?

No. Paintings on copper plates were widely produced between the 16th and 18th centuries, and many thousands of these works still survive today.

During certain periods between 1550 and 1700, painting on copper became extremely popular, and in some decades more paintings were created on copper plates than on canvas or wooden panels.

Is it necessary to date a painting on copper for authentication?

Yes. Dating the copper plate is an important part of art authentication because it helps determine whether the support material is consistent with the claimed historical period and artist.

How is a painting on copper dated?

One of the primary methods used is trace profiling through X-ray fluorescence analysis.

This process identifies trace elements present in the copper and compares them with known historical metal compositions associated with specific time periods.

Although the results may not provide an exact year, they can establish a reliable historical timeframe for the copper plate.

How long does it take to date a painting on copper?

Depending on laboratory scheduling, transportation, and examination complexity, the dating process for a copper plate painting may take approximately six weeks.

What is an authentication by declaration?

An authentication by declaration occurs when an artist personally confirms that they created a specific artwork.

This type of authentication involves directly contacting the artist and asking whether the painting is their work.

In some cases, artists may review photographs of the artwork, while in others they may request to examine the painting in person before making a declaration.

A personal confirmation from the artist is considered one of the strongest forms of art authentication.

Should I contact the artist to authenticate my painting?

Yes. If the artist is living and reachable, obtaining a direct declaration from the artist can provide powerful support for authentication.

The process may involve communicating with the artist, arranging appointments, presenting the artwork for review, and managing any required travel or logistics for an in-person examination.

Can digital image analysis authenticate a painting?

No. Digital image analysis alone cannot authenticate a painting.

However, it can measure visual similarities between your painting and recorded works by a particular artist by analyzing patterns, brushwork, color distribution, and other image-based characteristics.

Would digital image analysis help authenticate my painting?

Digital image analysis may increase confidence that a painting is visually consistent with an artist’s known works, but it is not considered sufficient on its own for full art authentication.

Important authentication steps such as provenance research, material analysis, stylistic examination, technical evaluation, and forensic studies are still necessary.

Is digital image analysis expensive?

Yes. Digital image analysis is considered one of the more expensive methods used in art authentication.

The process often requires scanning and analyzing a large number of authenticated artworks in very high resolution before meaningful comparisons can be made.

Because of the amount of data preparation and technical analysis involved, the procedure can also be time-consuming.

Can documentary research authenticate a painting?

Yes. Documentary research can help authenticate a painting by providing evidence that the artwork existed in the past and was sold, bought, collected, or exhibited as a work by the artist.

How far back must documentary research go?

The closer the documentation is to the date of creation of the painting, the stronger the evidence for art authentication.

How is documentary research performed?

The references you are looking for may be found in art libraries, archives, museums, family papers of the artist, and documents held by previous owners.

How long does documentary research take?

From a few days in straightforward cases to several months in more complex situations.

It becomes time-consuming when the artist lived in a country with limited records or one affected by wars.

Should I perform documentary research to authenticate my painting?

If it is a highly valuable painting, yes, documentary research is recommended for art authentication.

We perform documentary research worldwide, in all countries where relevant references may be found, and in the top 15 languages.

What happens if the photos I took are of low quality?

We use deconvolution methods based on the Fast Fourier Transform (FFT) process to correct issues in low-quality images and to improve clarity, sharpness, and detail.

This can enhance photographs to varying degrees depending on how subpar they are.

While this allows us to examine your painting more effectively at an initial stage of art authentication, it does not replace the need for high-quality images and specialized photography as the authentication process progresses.

Can forensic analyses authenticate my painting?

Yes. Forensic chemistry can contribute to art authentication, usually by implication rather than direct proof.

What information does forensic chemistry provide?

Forensic chemistry allows us to extract information about dates, locations, and people, helping determine what is possible, unlikely, or impossible in relation to the authenticity of a painting.

What can be analyzed with forensic chemistry?

Its applications include wood, metals, textiles, paper, ivory, paints, binders, glue, ink, clay, pastel, varnish, restoration materials, and it is also part of DNA profiling used in art authentication.

Can a painting be authenticated using high intensity illumination?

Yes. High intensity illumination can assist in art authentication. Examining a painting with a 300-watt light source or an 8,000 lumens flashlight can reveal details that are not visible under normal lighting conditions.

These may include signatures, monograms, artist symbols, dates, locations, short inscriptions, coats of arms, and even the name of the sitter in portraits.

Why do details and signatures become hidden in paintings?

Over time, paintings darken due to varnish discoloration, dirt accumulation, and exposure to candle smoke, oil lamps, kerosene lamps, fireplaces, wood stoves, and tobacco smoke.

During cleaning, signatures and other details may also become partially or almost completely erased, only becoming visible again under strong illumination.

Additionally, many paintings are displayed in low-light interiors or away from windows, which further reduces visibility.

Will high intensity illumination damage my painting?

No, provided proper precautions are taken. If the heat from the light source is kept at a safe distance and exposure is limited to a few minutes at a time, high intensity illumination can be safely used in art authentication without damaging the painting.

Where do you examine paintings?

Anywhere in the world where a valuable painting, artwork, or collection is located. Worldwide.

Can I ship my painting to you to examine it?

For the safety of the painting, we recommend that you ship it to a secure art storage facility. These protected art facilities exist in all major cities. We can recommend some that our clients have used. This is the safest way to proceed. When we examine your painting at these facilities, it is done under video surveillance.

Will an examination of my painting result in authenticating it?

Yes, it frequently does, because the examination is often performed after other art authentication steps have already been completed. In those cases, the in-person examination serves as the final confirmation of authenticity.

How do I set up an examination of my painting?

Tell us about the painting and where it is located, and we will determine where and when to examine it.

What is the Morelian method in art authentication?

The art market and art scholars have been searching for reliable art authentication methods since the mid-1800s.

Dr. Giovanni Morelli began publishing articles about his method in 1876 and his first book in 1880.

Despite advances in science and technology, the Morelian method continues to be used in art authentication.

It consists of examining and comparing how secondary details are executed in a painting.

Dr. Morelli’s theory was that artists render secondary details quickly and almost subconsciously, and that these details contain unique characteristics or quirks that can identify the artist.

The Morelian method is similar to handwriting analysis. It studies how an artist paints recurring details, just as one compares how a person forms specific letters.

How reliable is the Morelian authentication method?

In cases where definitive evidence is not available, a Morelian analysis can build a structured and well-supported case in favor of authenticity.

How long does it take to perform a Morelian analysis?

Two to three weeks.

Can the provenance of a painting authenticate it?

Yes. Provenance is a key factor in art authentication because it is based on verifiable facts rather than opinions.

What is the provenance of an artwork?

It is its uninterrupted and documented chain of ownership, starting with the artist and ending with the current owner, listing everyone in between. Each transfer of ownership must be documented, with no missing links.

Can the provenance of a painting be reconstructed?

Yes. It involves researching who owned the painting before the current owner, then tracing each prior owner all the way back to the artist.

Where is provenance research done?

In archives, libraries, city halls, museums, bank records, and through interviews with individuals who may have relevant information, including family members of past owners. Provenance research is similar to investigative journalism and requires searching multiple sources and speaking with many people.

How long does it take to verify or reconstruct provenance?

From a few days in simple cases to several months in complex situations involving multiple countries and difficult-to-find records.

Should I conduct provenance research to authenticate my painting?

Yes, if simpler art authentication methods have not provided answers.

Yes, if your painting is by a well-known artist and has significant value.

We perform provenance research worldwide, following the investigation wherever it leads, using thorough and resourceful methods to obtain the necessary information.

What is a Reversal authentication?

It is what happens when your painting is not a copy of a known original but is in fact the original, and the other painting is the copy.

How often do reversals happen?

They happen frequently. Cases where a presumed copy turns out to be the original are a recurring feature of the art world and art market.

Why are there so many cases of copies and originals being confused?

Before photography, paintings were routinely copied. The most popular works were copied the most, sometimes resulting in many versions in circulation. Over time, the best copies became confused with originals.

Can you tell if my painting is a copy or the original?

Yes. Using photography, technology, and art authentication methods, we can determine the status of your painting.

How long does it take to determine if my painting is the original?

It takes several weeks, as we must obtain high-resolution images of both your painting and the one currently considered the original, and perform technical analysis.

Should I check if my painting might be the original?

Yes. In some cases, the probability that your painting is the original version can be higher than expected, especially when multiple versions of the same composition exist.

How can a paper analysis help me authenticate my watercolor, pastel, gouache, drawing or fine art print?

Before 1940, paper did not contain synthetic fibers.

A chemical analysis of a paper sample will reveal whether synthetic fibers are present. If they are, the paper was manufactured after 1940 and most likely after 1950. Very little paper containing synthetic fibers was produced between 1940 and 1950, and it was not intended for writing or drawing.

What is the benefit of a paper analysis over other dating methods?

Most paper dating methods are not precise and typically provide results within a range of plus or minus 25 years, creating a 50-year window that can limit their usefulness in authentication.

The synthetic fiber test is more precise. If synthetic fibers are present, the paper cannot date from earlier periods and is highly unlikely to date from before 1950. This makes it a valuable method for art authentication.

When is this method most useful?

When authenticating works on paper such as watercolors, pastels, gouaches, drawings, lithographs, and other prints by artists who were active before 1950.

How long does it take to analyze paper?

Two to three weeks.

How can wood analysis help authenticate my panel painting?

If your painting is on panel, identifying the wood species is an important step in art authentication.

For example, confirming that certain panels were Baltic oak helped establish consistency with known authentic works.

Identifying the wood also facilitates dendrochronological dating by determining the type of tree used.

For these reasons, if your painting is on panel, determining the wood species is recommended.

How long does it take to identify the wood species?

Usually a few weeks.

What is statistical probability in art authentication?

There are authentication cases where no external information or references can be found to support that a painting is authentic.

In such cases, one method consists of comparing all measurable metrics in the painting against the statistical range of the artist’s known oeuvre, using as much of it as possible in art authentication.

If, over multiple measurements, the results consistently fall within the artist’s statistical patterns, the probability increases that the artwork is authentic.

Depending on the number of metrics analyzed, and additional factors such as discrepancies, dissenting opinions, and potential red flags, the painting may be authenticated on statistical grounds.

Will an analysis of the technique authenticate my painting?

It will contribute substantially to art authentication, but additional supporting evidence is usually required to confirm authenticity.

How important is it to examine the painting technique?

It is one of the major internal factors in art authentication. The way an artist applies paint to a surface is highly individual. While technique can vary depending on subject and intent, artists generally show consistent and recognizable preferences in execution.

What is needed to perform an analysis of the technique?

High-resolution photographs, macro images, raking light photography, and in many cases X-rays are also useful for art authentication.

How long does it take to perform a technique analysis?

An average of 3 weeks.

How do transmitted light photographs help in authenticating my painting?

Transmitted light reveals signatures, monograms, symbols, dates, locations, names, dedications, inscriptions, blind stamps, watermarks, the internal structure of the support, internal damage, restoration, paint thickness, underdrawings, and pentimenti.

This is such a rich source of information that it can, in some cases, be sufficient to support art authentication.

Should I get transmitted light photographs?

Yes. It may help authenticate your painting and, in any case, provides valuable information for art authentication.

Can I take transmitted light photographs myself?

Yes, if you are an amateur photographer and have a camera and tripod. If you do not have a tripod and are working with a phone, you will need to use a professional photographer.

Can stamps and labels authenticate my painting?

Yes. The verso of paintings frequently contains stencils, stamps, marks, seals, labels, stickers, numbers, names, addresses, dates, or inscriptions. These may come from the artist, galleries, auction houses, exhibitions, museums, framing shops, restoration studios, moving companies, or previous owners.

Through art authentication and forensic analysis, it is possible to determine whether these marks are genuine, who applied them, and when and where they were added.

This information is extremely useful in reconstructing the movement of a painting over time.

How is verso information used in art authentication?

The data is cross-referenced with where the artist lived, which galleries represented him, which exhibitions he participated in, and other verified historical facts, dates, places, and events.

Once this information is organized and verified, it can strongly support the authenticity of the painting.

How long does it take to research the verso of a painting?

It varies significantly depending on the nature, quantity, age, and origin of the material.

Some marks can take weeks to identify, especially when tracing historical seals, labels, or ownership marks across different countries and periods.

Should I have everything on the verso of my painting researched?

Yes. The verso contains critical forensic information. It is highly valuable and should be fully researched, identified, and dated as part of art authentication. In some cases, it may be sufficient on its own to support authenticity.

Can X-rays alone authenticate my painting?

Yes. In some cases, X-ray imaging reveals critical information that can be sufficient to support a conclusion of authenticity in art authentication.

What can an X-ray of my painting show?

X-raying a painting reveals what lies beneath the surface layers, including earlier compositions, underdrawings, pentimenti, restorations (inpainting), paint thickness, and sometimes signatures, dates, inscriptions, and compositional changes.

Should I get an X-ray of my painting?

For high-value works and important artists, X-ray examination is considered a standard procedure in art authentication, similar to imaging techniques used in the medical field.

It allows a deeper understanding of the structure of the painting and provides essential information below the visible surface. The first X-ray of a painting was taken in 1896.

After we receive your X-rays, we interpret them and explain what they reveal about the artwork.

Can archives authenticate a painting?

Yes, archives can help authenticate a painting. Archives contain unpublished photos, videos, correspondence with friends, relatives, artists, clients, dealers, art galleries, auctioneers, exhibition records, notes, journals, drafts of unpublished writings, and family documents such as wills, insurance policies, tax records, bank records, accounting records, and bills of sale.

Where are artists archives located?

Sometimes archives are located in a single country where the artist lived most of their life. In other cases, artists’ archives are spread across multiple locations worldwide, including Paris, Antibes, Vallauris, Mougins, Barcelona, Madrid, Malaga, Münster, Cologne, Naples, New York, and Philadelphia.

How long does archival research take?

Depending on the artist and archive location, archival research for art authentication can take anywhere from a single day to several weeks.

Should I use archival research to authenticate my painting?

Yes, archival research is strongly recommended for art authentication because it provides valuable information and supporting documents that may help verify the authenticity of a painting.

Do you perform archival research worldwide?

Yes, archival research can be performed in locations worldwide where the artist’s archives are available.

Can biographical details authenticate a painting?

Yes. Biographical research can help authenticate a painting by connecting the artwork to important details from the artist’s life.

Information about who the artist knew, relationships, travels, residences, personal habits, interests, and daily activities can provide valuable evidence supporting authentication.

In many cases, a direct connection can be established between a painting and a specific place, event, person, or period in the artist’s life.

How long does biographical research take?

Biographical research for art authentication can take from several days to a few weeks because it requires extensive reading, investigation, and review of publications and historical documents.

Additional time may also be needed to request and obtain important records or reference materials.

In which languages is research performed?

Biographical research for art authentication can be conducted in many of the world’s most widely spoken languages to access a broader range of historical sources and records.

Should I authenticate my painting through biographical research?

Yes. Biographical research is strongly recommended for art authentication because it frequently uncovers important information that helps support the authenticity of a painting.

Extensive and detailed research across multiple languages can provide valuable insight into the artist’s life, movements, relationships, and artistic activities.

Is carbon dating used for the authentication of a painting?

Yes. Carbon dating is one of the scientific methods used in art authentication to determine whether a painting dates from the period when the artist was alive.

It helps establish the approximate age of materials used in the artwork and can support the authentication process.

What materials can carbon dating analyze?

Carbon dating can be used on materials such as canvas, linen, silk, wood panels, boards, paper, cardboard, leather, ivory, and horn.

This allows many painting supports and related materials to be scientifically dated, except for materials such as glass, metals, and ceramics.

How long does carbon dating take?

Radiocarbon dating of painting materials can take anywhere from about one week to approximately thirty days, depending on the testing process and laboratory requirements.

Should I carbon date my painting?

Yes, carbon dating is recommended when there are questions or doubts about the age of a painting or its materials.

Scientific dating can provide valuable evidence during the art authentication process and help determine whether the materials are consistent with the artist’s lifetime and historical period.

What is a Connoisseur?

A connoisseur is an art historian or specialist who has spent many years studying the works of a particular artist.

Through long-term specialization, the connoisseur becomes deeply familiar with the artist’s paintings, techniques, materials, stylistic development, subjects, and artistic methods.

This expertise includes knowledge of the artist’s preferred colors, handling of light and contrast, composition, use of space, perspective, painting materials, and the natural aging characteristics of the artworks.

A connoisseur in art authentication is considered a highly experienced and valuable expert because of this extensive familiarity with the artist’s body of work.

Why is connoisseurship important in art authentication?

Connoisseurship is important because it helps evaluate the artistic qualities of a painting, including style, composition, technique, and subtle visual characteristics that may not be immediately obvious.

Experienced connoisseurs can compare the artwork being examined with known authenticated works and identify details that support or challenge attribution to a specific artist.

Art authentication often relies on the knowledge and judgment of specialists and connoisseurs with years of focused study and practical examination of original artworks.

Is craquelure used to date paintings on canvas?

Yes. Craquelure dating is commonly used in art authentication because it is a non-invasive method that does not require removing samples from the painting.

It can often be performed during an in-person examination without shipping the artwork, making it practical for on-site analysis.

What are the benefits of craquelure dating?

Craquelure usually begins to develop on paintings after several decades and can help estimate when the painting was executed.

Unlike methods that only date materials, craquelure analysis helps evaluate the aging process of the painted surface itself.

The age of the canvas or pigments alone does not necessarily indicate when the artwork was actually painted, while craquelure can provide clues related to the painting’s physical aging.

Can craquelure dating be performed using photographs?

Yes. Craquelure can sometimes be analyzed photographically if a detailed set of high-resolution images is available.

The photographs must clearly capture the painting’s surface texture, crack patterns, and fine details under proper lighting conditions.

How precise is craquelure dating?

Craquelure dating is useful for distinguishing older or antique paintings from more recent copies or imitations.

While it may not be as precise as certain laboratory dating methods, it remains an important supporting tool in art authentication.

Can craquelure be analyzed on all painting supports?

Craquelure on canvas is generally the easiest to evaluate.

Craquelure on wooden panels may require microscopic examination, while craquelure on metal surfaces often requires laboratory analysis involving corrosion studies.

How long does craquelure dating take?

For paintings on canvas, craquelure analysis may take one to two hours depending on the examination conditions.

For paintings on wooden panels, the process may take about a day, while metal artworks can require a week or longer depending on laboratory availability.

Should I have my painting’s craquelure analyzed?

Yes. Craquelure analysis can support art authentication and strengthen the overall evidence regarding a painting’s authenticity and age.

Technical examination and detailed photographic documentation are often important parts of the authentication process.

What is the Danzig Method?

The Danzig Method, also known as Pictology, is an art authentication technique developed in the 1930s by M. M. van Danzig.

This method focuses on studying and comparing artworks at the micro-technical and micro-stylistic levels to evaluate whether a painting is consistent with the artist’s known working methods.

The analysis examines detailed characteristics such as:

- The length of brushstrokes or drawing strokes
- The relative proportions of each stroke
- Stroke width and tapering
- Direction and density of strokes
- Amount of pressure applied
- Color density and paint handling
- Paint viscosity and texture

Should I get a Danzig analysis of my painting?

Yes. Technical inconsistencies are one of the most common reasons paintings are rejected during art authentication.

A Danzig analysis can help determine whether the painting’s technical execution matches the artist’s known methods and habits, providing valuable support for authentication.

How long does a Danzig analysis take?

A Danzig or Pictology analysis generally takes about three weeks, depending on the complexity of the artwork and the amount of comparative material available.

Is the original painting required for a Danzig analysis?

No. A large set of clear, high-resolution photographs taken under proper lighting conditions is usually sufficient for conducting a Danzig analysis.

What should be dated in a painting to support authentication?

Several components of a painting can be dated as part of the art authentication process.

These may include the support material, such as canvas, wood panel, board, metal sheet, or paper.

The paint pigments can also be analyzed to determine whether they are consistent with the historical period of the artist.

Craquelure is another important factor because it develops gradually over time and may help indicate when the paint was originally applied.

Additional components that may be dated include stretcher bars and tacks or nails if they appear to be original to the artwork.

Other materials and structural elements may also be examined through forensic studies and scientific analysis.

Why is it important to date multiple components of a painting?

Dating multiple elements helps determine whether the painting and its materials are consistent with the lifetime and working period of the artist.

This process can reduce concerns that the artwork was created later, after the artist became well known and the value of the works increased.

When all major materials correspond to the correct historical timeframe, it strengthens the foundation for further authentication analysis.

How long does it take to date all materials in a painting?

Dating and analyzing the various components of a painting may take several weeks depending on the number of tests, the complexity of the artwork, and laboratory scheduling.

Can all components of a painting be dated?

Yes. Multiple parts of a painting can be examined and dated using scientific, forensic, and technical methods commonly used in art authentication.

What is dendrochronology?

Dendrochronology is a scientific dating method used in art authentication that analyzes the annual growth rings found in wood.

By studying these growth ring patterns, specialists can estimate when the tree used for a wooden panel was cut down, often with a precision of about one year.

After a tree is felled, the wood is typically seasoned and dried before being used for painting panels. For woods such as oak and walnut, this process usually takes around three years, and sometimes longer in humid environments.

Dendrochronology can help establish the earliest possible date when a panel painting could have been created.

When can dendrochronology be performed?

Dendrochronological analysis is possible when the wood grain and growth rings are clearly visible and when enough rings are present to create a recognizable sequence for comparison.

Should I have my painting dendrochronologically dated?

Yes. If your painting is on a wooden panel and the growth rings are visible, dendrochronology is strongly recommended as part of the art authentication process.

This method can provide valuable dating evidence and help determine whether the wood support is consistent with the claimed historical period of the artwork.

Can DNA determine if my painting is authentic?

Yes. DNA can be used in art authentication, although the procedure is

different from other methods. The matching technologies are the same as those used in other DNA identification applications.

What types of DNA authentication services are available?

We provide three main types of DNA analysis for art authentication:

• - Basic DNA analysis (atDNA, mtDNA, Y-DNA, X-DNA)
  Used for identifying the artist.
• - Next-Generation Sequencing (NGS)
  Used for identifying the artist through transfer, touch, or trace DNA.
• - Investigative Genetic Genealogy (IGG)
  Used for identifying the family circle or relatives of the artist.

How do I proceed with DNA authentication?

Let us know who the artist is, and we will determine what is possible and advise you on the next steps in the art authentication process.

DNA (Deoxyribonucleic acid)

Is it possible that my painting could be a second original by the artist?

Yes. Artists often produced multiple original versions of the same composition.

For example, Vincent van Gogh painted two versions of the Pietà. Leonardo da Vinci painted two versions of the Virgin of the Rocks. John Singleton Copley painted three originals of Watson and the Shark. Caravaggio painted The Lute Player multiple times. Arnold Böcklin painted five versions of Isle of the Dead. Gilbert Stuart painted about 72 versions of the Athenaeum portrait of George Washington.

How can I tell if my painting is a duplicate original and not a copy?

We examine and compare the painting using art authentication methods, including photography, technical analysis, and selected tests. We then confirm and certify whether your painting is a duplicate original by the artist.

How long does it take to verify a duplicate original?

A few weeks, as art authentication requires specialized photography and technical examination.

Can fingerprints in my painting authenticate it?

Yes. Fingerprint analysis can be used in art authentication. Just as fingerprints identify individuals in documents and criminal investigations, they can be used to identify artists.

How do I find out if there are fingerprints on my painting?

An examination must be performed, and any fingerprints present must be photographed using a macro lens.

How do you determine if the fingerprints belong to the artist?

We have a professional law enforcement fingerprint examiner perform the comparisons and provide a report as part of the art authentication process.

How long does fingerprint authentication take?

It varies depending on the artist, but about two months is a reasonable estimate for fingerprint-based art authentication.

What is the purpose of forensic linguistics in the authentication of paintings?

It is common for paintings to carry inscriptions on the verso or to come with documents supporting their authenticity, such as letters, notes, statements, or declarations, often attributed to the artist.

Forensic linguistics in art authentication allows us to date handwriting, determine its geographical origin, and use dialectology to assess whether the text was written by a native speaker.

With this information, we can often determine whether the artist wrote the text and whether the documents are authentic.

Authentic documents associated with a painting carry significant weight and contribute substantially to establishing authenticity.

In which languages do you perform forensic linguistic analysis?

We conduct forensic linguistic analysis for art authentication in about 15 languages: English, Spanish, Italian, Portuguese, French, Catalan, German, Finnish, Swedish, Ukrainian, Russian, Arabic, Hindi, Urdu, Bengali, and Mandarin.

What is required to perform forensic linguistic analysis?

High-resolution photographs or scans of the texts or inscriptions are required for forensic linguistics in art authentication.

Why is high-resolution photography important in art authentication?

One part of art authentication is visual. The painting must be examined and compared to other works by the artist.

We evaluate wear and tear, discoloration, the age of materials, the shape and depth of cracks, how the paint was applied, and how much was used.

Signatures, fingerprints, and underdrawings also require sharp, detailed visuals.

For these reasons, high-resolution photography is essential in art authentication.

Can I take high-resolution photos myself?

Yes. Use a small tripod so your camera or phone remains stable, and use a wireless remote or delayed shutter.

Use plenty of light—the camera cannot capture what it cannot see. Take many photos, adjusting the angle slightly and reshooting each detail several times.

It is common to take 100 to 200 images of a mid-size painting. Save images in RAW format, which preserves all the data captured by the camera.

Can you take the photos for me?

Yes. We can come to you, you can come to us, or we can meet in between. You may also use a local professional photographer. We will coordinate directly and provide detailed instructions for art authentication photography.

What is considered high resolution?

• 300 dpi (dots per inch)
• 4,000 × 6,000 pixels
• RAW format
• Tripod
• Strong, even lighting

Will you be using infrared to authenticate my painting?

Yes. Infrared light (0.7 µm to 1000 µm) is rich in what it reveals. We use it to identify paint pigments (FTIR spectroscopy) and to reveal underdrawings, signatures, pentimenti, previous compositions that have been painted over, damage, and restoration (IRR infrared reflectography).

Will exposure to infrared damage my painting?

No. It is non-invasive.

Will infrared photos authenticate my painting?

Yes, if, for example, an identifiable previous composition is found or another element that clearly links the painting to the artist.

How does a Necessary Condition Analysis (NCA) apply to authenticating my painting?

The simplest example is that the materials in the painting must have existed at the time the artist was alive and working.

Likewise, in a cityscape, the buildings, monuments, or landmarks depicted must have existed when the artist painted it.

Depending on the painting, the necessary conditions for art authentication will vary.

How do I find out which necessary conditions apply to my painting?

Send us photos and any information you have, and we will determine the applicable conditions as part of the art authentication process.

Why should I take raking light photos of my painting?

Raking light photography reveals surface details that are not visible under normal lighting. Just as raking light has revealed the rugged surface of the moon, it can reveal the true texture of a painting.

It shows how much impasto there is, how thick the paint is, and how it was applied. It can help identify whether the artist used brushes, what kind of brushes, a palette knife, sponges, rags, squeegees, pouring, splattering, airbrushing, or even fingertips.

Will raking light photos help me authenticate my painting?

Yes. They reveal painting techniques and tools used by the artist, which supports authenticity from a technical standpoint in art authentication.

How can a canvas analysis help me authenticate my painting?

Before 1950, textile supports used in paintings, such as canvas, linen, and silk, did not contain synthetic fibers.

A chemical analysis of a canvas sample will reveal whether synthetic fibers are present. If they are, the canvas was manufactured after 1950, which is critical information for art authentication.

What is the benefit of a canvas analysis over other dating methods?

Most dating methods for painting materials are not precise and often provide results within a range of plus or minus 25 years, creating a 50-year window that can limit their usefulness in authentication.

The synthetic fiber test is more precise. If synthetic fibers are present, the canvas cannot date from earlier periods and must have been produced after 1950. This makes it particularly useful for art authentication.

When is this method most useful?

When authenticating paintings by artists who were active before 1950.

How long does it take to analyze canvas?

Two to three weeks.

Do I need to date the pigments in my painting?

If your painting was created after 1945, pigment dating is usually not necessary because age is generally not in question.

If your painting is older, determining whether it was painted during the artist’s lifetime is often essential in art authentication.

For this reason, we use various methods to determine the age of materials, including chemical analysis of the paint.

Once the composition is known, we establish the terminus post quem for each pigment.

Will dating the pigments authenticate my painting?

It will show that your painting could have been created by the artist, since all pigments identified were available during the artist’s lifetime.

My painting has been restored. Will this affect pigment dating?

It depends on the extent of restoration and whether newer paint can be separated from original layers so that only the original pigments are analyzed.

How long does pigment dating take?

Usually about 30 days.

Which colors should be analyzed?

White, blue, yellow, red, green. More is better.

How can I check if the signature on my painting is authentic?

Our professional forensic signature and handwriting examiners determine whether signatures, monograms, dates, locations, inscriptions, dedications, and other writings are authentic as part of art authentication.

Do I need to send my painting to have the signature authenticated?

No. High-resolution macro photographs are sufficient.

Can a signature authenticate my painting?

The art market prefers authentication to be based on more than the signature alone. While an authentic signature is an important element, it should be supported by other factors such as style, materials, subject matter, and technique.

How long does a forensic signature examination take?

About 10 days.

Can a stylistic analysis alone authenticate my painting?

Yes, if the painting is of modest value. If the painting is by an internationally famous artist and has high value, more evidence will be required to establish authenticity in art authentication.

How important is stylistic analysis for a painting?

For works by major artists, it is crucial. It is more than important—it is a prerequisite. The painting must be a strong stylistic match to be considered a candidate.

Is it easy to perform a high-quality stylistic analysis?

No. It requires advanced art analytical skills, solid art history training, strong art appreciation background, and years of experience performing stylistic evaluations.

How long does it take to perform a stylistic analysis?

An average of 3 weeks.

Who performs stylistic analyses?

Nearly all stylistic analyses are performed by specialists with PhD degrees in art history and at least 10 years of experience in art authentication and stylistic evaluation.

What is thermoluminescence?

It is a scientific ceramic dating method used in art authentication. Many artists produced works on clay or porcelain. Some of the most well-known include Marc Chagall, Salvador Dalí, Raoul Dufy, Paul Gauguin, Natalia Goncharova, Wassily Kandinsky, Fernand Léger, Kazimir Malevich, Henri Matisse, Joan Miró, Pablo Picasso, Pierre-Auguste Renoir, Nikolai Suetin, Louis Comfort Tiffany, and Mikhail Vrubel

Should I get my ceramic artwork dated with thermoluminescence?

Yes. Establishing a scientifically verified age for the object strongly supports art authentication.

How long does thermoluminescence take?

About 30 days, including sample mailing time.

Does ultraviolet photography authenticate paintings?

It contributes to art authentication because it reveals information about newer and older paint layers, varnish, restorations, in-painting, and signatures.

Should I get my painting photographed under ultraviolet light?

Yes. It is a standard procedure in art authentication to examine and photograph paintings under ultraviolet light. The information provided can significantly support the authentication process. A faded signature that is barely visible may also become clearer under ultraviolet illumination. When we examine paintings in person, ultraviolet photography is included as part of the technical documentation.

Can witnesses authenticate a painting?

Yes. Relatives, friends, lovers, and other artists may testify about artworks being authentic because they were present when the artist created them. In other cases, they may have witnessed the artist gifting the painting.

How reliable are witnesses in authentication cases?

The most reliable witnesses are those who directly observed the creation of the artwork or its transfer by the artist.

Credibility is stronger when witnesses have no financial interest or personal gain in the outcome of the art authentication process.