A Ranger Naturalist Service travel poster for Zion National Park, the last of the 1938 WPA/NPS silkscreen series this house has sourced so far. Same program, same silkscreen shop, same national promise — a sandstone canyon sold with the same confidence as a geyser or a glacier. The canyon walls stacked as flat overlapping planes, deepest red at the base. A closing note in flat, unhurried color.

Maker: C. Don Powell
Date: 1938
Medium of the original: Travel poster
Original held by: Library of Congress
Credit: Library of Congress · via Wikimedia Commons
Rights: Cleared for print
Catalogue number: PA-00858

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 10 in	530	Excellent	Trimmed 7.6%
8 x 12 in	478	Excellent	Trimmed 9.8%
11 x 14 in	386	Excellent	Trimmed 5.9%
12 x 16 in	353	Excellent	Trimmed 1.4%
12 x 18 in	319	Excellent	Trimmed 9.8%
16 x 20 in	265	Excellent	Trimmed 7.6%
16 x 24 in	239	Excellent	Trimmed 9.8%
18 x 24 in	235	Excellent	Trimmed 1.4%
20 x 30 in	191	Good	Trimmed 9.8%
24 x 30 in	176	Good	Trimmed 7.6%
24 x 36 in	159	Good	Trimmed 9.8%

Sizes withheld
Size	Why
30 x 40 in	141 dpi; a historical scan is never enlarged
36 x 48 in	117 dpi; a historical scan is never enlarged
40 x 60 in	95 dpi; a historical scan is never enlarged

Scanned: 2026-10-07
Master file: 4,246 x 5,742 px, srgb
Tone: Darks 36, lights 176 of 255; 0% clipped light, 0% clipped dark
Colour: 0% vivid
Sharpness: 6.11