Am 09.11.18 um 17:20 schrieb luigi scarso:
I think you should use the best colorspace (<something>rgb ) and let the print shop do its job -- of course this means that you have signed their sample (hard proof) of your project.
I really tend to do this. I am currently exploring the color management system of ConTeXt together with a friend you is working as a color manager in print industry.
And my first try was a failure. The cmyk values in the resulting pdf file (with color profile) differs from the values we calculated (using the same color profile in Gimp).
But we have to investigate a bit further, so don't panic. Maybe I the fault was mine.
Is there a test case tex file we could use to test the color management?
On 11/10/2018 2:34 PM, Jan U. Hasecke wrote: there is no real 1-1 translation from rgb-cmyk .. in many programs that do that there is some additional magic (i remember that photoshop also applied the paper properties and that there was no roundtrip) this is where color profiles come in even viewers (like acrobat) can apply some magic so that the colors come out different from what you expect try this on screen and in print: \startMPpage path p ; p := fullcircle scaled 1cm ; fill p shifted (0cm,1cm) withcolor (1,1,0) ; fill p shifted (1cm,1cm) withcolor (0,0,1,0) ; fill p shifted (0cm,0cm) withcolor (1/2,1/2,0) ; fill p shifted (1cm,0cm) withcolor (0,0,1/2,0) ; \stopMPpage Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------