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An expert-approved guide to detecting expensive art
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Art collecting is an expensive hobby, but some eagle-eyed aficionados can score valuable masterpieces at bargain-bin prices. Whether you’re hunting for deals at a thrift shop or evaluating a piece at an art show, knowing how to determine a painting’s authenticity and worth will help you spot great deals in a sea of knock-offs and reprints.

Things You Should Know

  • The easiest way to tell if a painting is authentic is to look for the artist’s signature on the front or back of the piece.
  • Hold a magnifying glass up to a painting and look for small, perfectly-round dots arranged in a grid. If you see any, the piece is a reproduction print created using a laser printer.
  • To determine the authenticity of an oil painting, check to see if the surface has bumps or paint waves on it. If your piece is textured, there’s a good chance it is authentic.
Method 1
Method 1 of 2:

Searching for High-Value Pieces

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  1. For many people, the goal of art hunting is to find a lost masterpiece from a beloved artist. Though you most likely won’t find anything by Monet or Vermeer, you may come across a hidden gem made by a lesser-known or regionally popular painter. [1]
    • Some artists whose work ended up at thrift stores include Ben Nicholson, Ilya Bolotowsky, Giovanni Battista Torriglia, Alexander Calder, and even Pablo Picasso.
    • So you’ll know what paintings to keep an eye out for, learn about different artists through local galleries, art museums, and online databases like the Web Gallery of Art.
  2. If you stumble upon a piece you think may be valuable, try searching for it on Google or a similar search engine. If the painting shows up in your search results, you may have found a valuable item. [2]
    • If you don’t know the name of a painting, search for it using descriptors. For example, you can find Thomas Gainsborough’s The Blue Boy with the terms “painting,” “kid,” and “blue.”
    • If you can take a high-quality photo of the piece, try running it through Google’s Reverse Image Search at https://reverse.photos . This will make the searching process far easier.
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  3. Though most art prints have little to no financial value, there are a couple of notable exceptions. Look out for prints that were part of a limited edition run, meaning the artist only produced a few copies, and prints with a handwritten signature from the artist on the front or back, as these are usually more valuable. [3]
    • Most limited edition prints have numbers on them indicating which copy you have and how many copies exist.
  4. Unless you stumble upon an original piece by a popular artist, stay away from paintings that are extremely small in size or subtle to the point of being abstract. Though these paintings may be excellent, they don’t have the same mass appeal that a large, traditional painting does, making them harder to sell.
    • This is especially important if you plan to sell your paintings online since small and abstract art is hard to convey over digitized photographs.
  5. Even if you decide that a painting is not valuable, make sure to examine the frame before moving on. Picture frames are works of art in their own right, so a vintage or well-crafted frame may be worth a lot regardless of the painting inside. Look for frames with: [4]
    • Hand-carved designs
    • Intricate or unique patterns
    • Gilded molding
    • Slight wear and similar signs of age
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Method 2
Method 2 of 2:

Determining a Painting’s Authenticity

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  1. Often, the easiest way to tell if a painting is authentic or not is to look for the artist’s signature on the front or back side. In particular, look for a signature that was hand-written or added to the piece using paint. If a painting doesn’t have a signature, or if the signature seems flat and artificial, there’s a good chance the piece is a reproduction print or fake. [5]
    • If you know the artist’s name, look them up online and see if their signature matches the version on the painting.
    • Signatures are easy to fake, so don’t use this as your only proof of authenticity.
  2. Before purchasing a painting, hold a magnifying glass up to it and look for small, perfectly-round dots arranged in a grid. If you see any, the piece is a reproduction print created using a laser printer. [6]
    • Though this method will help you identify common prints, be aware that it may not work for higher-quality giclee reproductions.
    • Unlike laser prints, paintings made using a pointillist technique will have dots of varying sizes and shapes.
  3. When determining the authenticity of an oil painting, check to see if the surface has bumps or paint waves on it. If your piece has a significant amount of texture, there’s a good chance it is authentic. If the surface is completely flat, you’re looking at a reproduction. [7]
    • If a painting only has 1 or 2 spots of texture, it may be a forgery disguising itself as the real deal.
  4. To determine whether or not a watercolor painting is authentic, hold the piece at an angle and look at the paint strokes closely. If the paper appears rough around major strokes, you may have an original work of art. If the paper is uniformly smooth, it’s most likely a reproduction. [8]
  5. A lot of the time, artists who work on canvas will make jagged or uneven brush strokes along the edges of their paintings. However, they often don’t bother retouching these spots since viewers rarely look at them. As such, if a canvas painting has perfectly even edges, there’s a good chance it’s a factory reproduction. [9]
  6. Often, the back of a frame will tell you more about a painting than the artwork itself. Look for frames that are dark in color and have clear signs of age such as peeling lacquer and patches of worn out wood. The older a frame is, the more likely the piece inside is authentic. [10]
    • If the back of a frame is mostly dark but has a few bright streaks in it, there’s a good chance the painting is authentic but had to be relined at some point.
    • Many old frames have a X or H shape in the back, something far less common in contemporary frames.
  7. If nails hold the painting in place, or if you see empty nail holes around the frame, there’s a good chance the artwork is an original piece from before the 1940s. If staples hold the painting in place, there’s a greater chance it is a reproduction, especially if it is an old piece and has no signs of a prior mounting method.
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Community Q&A

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  • Question
    What do I do if I can't read the artist's name on a painting?
    Community Answer
    First of all, are you thinking of buying it because you like it? Have you checked to see if it is an original or a mass-produced copy? Take a picture of the signature, and look it up online to see if it matches a known artist. That in itself does not guarantee that the piece you are looking at is a genuine, original piece by the artist whose name is on it.
  • Question
    I have several paintings that I have collected over the years. They are signed, dated and numbered on the back. How can I find out whether they're valuable or not?
    Community Answer
    Often a local art gallery with a good reputation will provide a valuation. Check charges first.
  • Question
    How do I know if my painting is valuable if it has no signature?
    Thiago Piwowarczyk
    Community Answer
    A picture without a signature can still be identified by a professional. An art authenticator can identify the author, finding the history of the object and finally determining if it is authentic through forensic testing if necessary. The resulting authentication will allow for an certified art appraiser to valuate the work. Art appraisers are not usually capable to authenticate objects, but companies like NY Art Forensics offer both art authentication and certified art appraisal.
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      Expert Interview

      Thanks for reading our article! If you'd like to learn more about valuable paintings, check out our in-depth interview with Claire Wentzel .

      About This Article

      Article Summary X

      While hunting for valuable paintings, keep an eye out for authentic pieces that have the artist’s original signature on them. Before buying an oil painting, check to make sure that the surface has texture. When examining a watercolor piece, hold the painting at an angle and look for rough spots around the brush strokes. Reproduction prints are incredibly common, so use a magnifying glass to inspect potential purchases for printer dots. For advice on how to decide if an authentic painting is valuable, scroll down!

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