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Old 03-26-2022, 04:09 PM   #5
Quoth
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Quote:
Originally Posted by Colonel Cathcart View Post
what about pixel density?
Only about 70 dpi to 150 dpi is needed for signage. But I don't see anything about pixel density or resolution or response time (speed irrelevant for posters).

The Cyan Yellow Magenta must be in layers rather than in side by side of R G B or
R G
G B
Matrix schemes.
They'd need clear liquid and C, Y or M balls that are to sides for clear, then front and/or back for colour.
The regular eink uses a milky liquid and you see an negative image on the rear as the white & balk balls swap. Early eink had only black balls.

In theory layered C Y M is more than 6x brighter than than R G B. 19th C colour slides used R G B starch dots and were very dim compared to later C Y M layered coloured negatives and the cunning colour reversed slides.
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