The risk you are right to worry about

The fear is justified. A print made from a low-resolution scan or an image lifted from a website will look acceptable on screen and fall apart on the wall. Fine detail turns to mush, colour drifts, and a face or a horizon line develops a soft blur that no amount of framing hides. This happens constantly with lesser-known painters, because sellers know buyers cannot compare against a familiar original.

Eleutheriade is not a household name, which cuts both ways. There are fewer bad copies in circulation than there are for Monet, but also fewer published references to check a reproduction against. So the assessment has to rest on the print itself rather than on recognition. That is a solvable problem. Quality in reproduction is largely mechanical, and mechanical things can be verified before you spend anything.

Start with the source file. Ask, or look for, the resolution at the size being sold. A print needs roughly 300 DPI at its final dimensions, which means a 60 by 90 cm canvas needs a source image in the tens of megapixels. Anything less will soften when you stand close. Sellers who print from museum archives or licensed scans usually state this. Sellers who do not usually have a reason.

Checks for canvas editions

Canvas is the less forgiving format, because the texture is part of the object rather than something behind it. A good canvas edition uses a cotton or poly-cotton blend with a visible weave, printed with pigment inks that resist fading for decades. A cheap one uses thin polyester, dye inks and a coating that reads as plastic under lamplight. The difference is visible from a metre away.

Look at the edges and the back before anything else. A well-made canvas is stretched over solid stretcher bars, tensioned evenly, with the image either wrapped cleanly around the frame or kept on the front with plain mirror edges. Wrinkles at the corners, a wavy surface or visible staples without finishing tape all point to rushed work. For a concrete benchmark of what good looks like, it helps to compare against a properly made example such as the Rocks and Waves canvas edition and note the tension, the edge finish and the weight of the bars.

Colour is the other test. Eleutheriade's palette, like much work from her period, shifts under poor reproduction; a warm ground can go muddy and a cool sky can go grey. Reputable printers work from colour-managed files and calibrate their machines. Ask whether the edition was proofed against the source image. If the answer is vague, expect drift.

Checks for framed posters

A framed poster lives or dies on two things, the paper and the frame itself. Archival matte or textured paper of 200 to 250 gsm holds detail and reads as a print rather than a poster. Thin glossy stock, under about 150 gsm, curls in the frame, reflects room light and flattens tonal range. The paper weight is almost always listed; when it is not, that omission tells you something.

The frame is where sellers cut costs invisibly. Solid wood or aluminium mouldings hold square for years; plastic mouldings bow, and a bowed frame shows as a gap between print and glazing that no photograph in the listing will reveal. Glazing matters too, since acrylic or real glass protects the surface where thin film does not. A useful comparison point is a properly specified piece such as the Poppies framed poster, where the moulding, glazing and paper weight are stated rather than implied.

One last check costs nothing. Zoom into the listing image at full size and look at high-contrast edges, a dark shape against a light ground. If the listing photo itself is sharp, that says little. But if the seller shows a detail crop, a corner or a close-up of the surface, it usually means they have nothing to hide. Sellers confident in their reproduction quality show detail; sellers selling soft scans show only the whole.