Start With Resolution and Source

The single biggest failure in online art prints is a low-resolution source file stretched to a large size. Ask one question before anything else. At what DPI is this image printed, at this exact size? A file that looks fine as a thumbnail can fall apart at 70 cm wide, showing soft edges and a faint pixel grid. Anything below 300 DPI at full size will disappoint up close, and below 150 DPI it will disappoint from across the room.

The second question is what the file was made from. The best reproductions come from high-resolution photography or scanning of the original painting, colour-corrected against it. Sellers who cannot or will not say where their digital source came from are telling you something. This matters more for a less-documented painter than for a famous one, because there are fewer authoritative reference images to compare against. The common mistakes people make when buying art prints online often trace back to exactly this gap.

If you want a sense of how a well-made canvas edition should look in person, compare against a known benchmark such as a sunlit meadow canvas edition and judge detail at arm's length.

Materials That Separate Good From Cheap

Resolution is half the story. The other half is what the image is printed on and with what. Pigment inks hold their colour for decades; dye-based inks fade noticeably within a few years, especially in daylight. Paper or canvas described as archival, acid-free and lignin-free is the baseline. A weight of 250 gsm or more on paper, or a heavy cotton-poly canvas with a real weave texture, signals a serious print shop rather than a poster mill.

Finishing is where cheap prints give themselves away fastest. Look for clean, even borders, no warping, no visible glue or staples on a stretched canvas, and framing joints that close tightly. On canvas, check that the image wraps the edges deliberately rather than cropping awkwardly into the composition. These are mechanical checks, not aesthetic ones, and you can make most of them from good product photographs before you spend anything.

The same standards apply across formats, which is why it helps to read how to choose between canvas and framed poster before committing to either.

Red Flags Worth Walking Away From

Some warning signs are unambiguous. A listing with no stated print size in DPI terms, no material specification, and no close-up photographs is asking you to buy blind. Oversaturated colour is another. Reproductions of early twentieth-century painting are especially prone to it, because automatic colour processing pushes muted palettes toward garishness. Compare the listing image against the most authoritative reproduction of the original you can find, and treat any obvious shift in hue or contrast as a defect, not a stylistic choice.

Price alone is a weak signal, but price combined with vagueness is not. A print sold at a low price with no information about ink, paper or source is almost always a low-resolution digital blowup. A print sold at a higher price with full specifications is at least accountable. The distinction matters for any reproduction purchase, whether it is a Triantafyllidis or a Moret on Loing autumn canvas, because the checks are identical. If a seller answers your questions directly, that answers most of your doubts too. For subjects and composition, it also helps to know what the originals typically depict, covered in the guide to Triantafyllidis's common subjects.

None of this requires expertise. It requires asking four or five questions and refusing vague answers.