[argyllcms] Re: Testing my new printer

  • From: Yves Gauvreau <gauvreau-yves@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Sun, 7 Jul 2019 17:55:50 -0400

Henrik and others,

I understand that we have to (shall) print these files (targen/printarg) with "no" color management that's a given. We feed these numbers directly to the printer to see what it does with them. That I perfectly understand. My mistake is unlike tiffgamut that require you to provide a profile to GIVE MEANING to these number, my program seems to assume this profile is sRGB by default, that's why it's such a perfect match.

I got carried away for a moment, sorry about that,


On 7/7/2019 4:12 PM, Henrik Olsen wrote:

Den 7. jul. 2019 kl. 21.02 skrev Yves Gauvreau <gauvreau-yves@xxxxxxxxxxx>:

Sorry Graham but I did use -c ProPhoto just to see and used a program like 
tiffgamut to see what gamut the target would have (ProPhoto) and it's a perfect 
fit with sRGB.

Maybe there is something I didn't see?
The target does not have a gamut as such. It should not be color managed. It’s 
device RGB values. Don’t interpret them. Do that with the spectro read and CIE 
results of printing the target RGB values as-is, no color management, to learn 
how the printer reacts to RGB input with which you can exercise/explore the 
available gamut response.

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