A Cape daisy whose flowers close overnight and in dull weather and open again with the sun — which made it a difficult subject, since a botanical artist working in a northern winter might never see it open at all. The Schönbrunn glasshouses existed largely to solve exactly that problem: keep the plant alive and warm long enough for the draughtsman to get it. An imperial glasshouse is, among other things, a device for making a flower hold still.

Maker: Nikolaus Joseph von Jacquin
Date: 1797–1804
Medium of the original: Plate
Original held by: Wikimedia Commons
Credit: Wikimedia Commons
Rights: Public domain, verified
Catalogue number: PA-01073

As chosen: 18 x 24 in, art print, classic frame
Picture	18 x 24 in
Outside size	19.6 x 25.6 in
Depth	0.9 in (22 mm)
Weight	[[REAL PROOF NEEDED: shipped weight per size and frame]]
Hanging	[[REAL PROOF NEEDED: hanging hardware Prodigi fits to this frame]]
Material	Enhanced matte art paper, 200 gsm; acrylic glazing
Made in	Charlotte, North Carolina, by Prodigi

Before a size goes on sale, the file is measured against it: pixels per inch at that size, how much of the picture a crop would lose, tone and sharpness. A size that fails is not offered, so there is nothing to choose wrong.

How the print check works

Sizes offered
Size	dpi	Grade	How it fits
8 x 12 in	450	Excellent	Trimmed 3.7%
12 x 16 in	311	Excellent	Trimmed 7.7%
12 x 18 in	300	Excellent	Trimmed 3.7%
16 x 24 in	225	Excellent	Trimmed 3.7%
18 x 24 in	207	Excellent	Trimmed 7.7%
20 x 30 in	180	Good	Trimmed 3.7%
24 x 36 in	150	Good	Trimmed 3.7%

Sizes withheld
Size	Why
8 x 10 in	Wrong shape: a 13% crop
11 x 14 in	Wrong shape: a 12% crop
16 x 20 in	Wrong shape: a 13% crop
24 x 30 in	Wrong shape: a 13% crop
30 x 40 in	124 dpi; a historical scan is never enlarged
36 x 48 in	103 dpi; a historical scan is never enlarged
40 x 60 in	90 dpi; a historical scan is never enlarged