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Doug Gray

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Very little color change over 3 years on Canson/Pro1000
« on: June 29, 2022, 11:43:03 pm »
I just rescanned a chart I printed made with Canson Photographique Matte 33 years ago. It was formatted to match a ColorChecker but in the standard 33x29 patch size so it could be read on an i1isis. Each ColorChecker patch is a set of 9, 6mm squares with a 6mm border and was printed using Abs. Col. to set the RGB values.

The Ave deltaE2000 across the 24 CC patches was .27, Worst case was .44.  How much of that is instrument drift and how much is color change is not known. But all in all I'm pretty surprised at the color stability.
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nirpat89

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Re: Very little color change over 3 years on Canson/Pro1000
« Reply #1 on: July 01, 2022, 08:23:39 am »
33 years....that's pretty impressive, indeed... :)
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Doug Gray

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Re: Very little color change over 3 years on Canson/Pro1000
« Reply #2 on: July 01, 2022, 10:04:55 am »
Quote from: nirpat89 on July 01, 2022, 08:23:39 am
33 years....that's pretty impressive, indeed... :)

Keyboard glitch. 3 years. :)
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digitaldog

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Re: Very little color change over 3 years on Canson/Pro1000
« Reply #3 on: July 01, 2022, 11:52:52 am »
Insignificant, invisible and yes, part of this is instrument noise of which, we have no idea without lots of testing on your part (which I'd suggest, is a waste of good time used elsewhere, maybe taking photos;D).
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Simon J.A. Simpson

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Re: Very little color change over 3 years on Canson/Pro1000
« Reply #4 on: July 02, 2022, 06:14:50 am »
Quote from: Doug Gray on July 01, 2022, 10:04:55 am
Keyboard glitch. 3 years. :)

Your printer is a time machine Doug !
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