Re: Global Change: Convert to Color Space
Reply #15 –
So would the Default Settings be considered horrible? Cause that's what's being used here, much as I think it's wrong.
Default settings are almost as bad as color management being turned off. In PitStop set the color profiles that you use in Photoshop/InDesign/Illustrator/Acrobat. Whatever you do; don't turn them off.
I might agree with that if all we used Pitstop for was converting RGB images to CMYK, But we rarely convert images from one color space to another in Acrobat and we prefer using whichever profile gives the best results when we do convert anything. And if you do convert anything with 100% black text to gray you really are going to get gray instead of black with anything other than having color management turned off. Using default settings or any color management profiles for everything is not a good thing. The operator should always use whatever achieves the best result for any given subject matter.
Best result no matter what the intended output intent is? You should use the right profile, which may or may not be a canned profile. Another benefit of using a good profile from you data is consistent separations. Meaning the separations are done in a consistent way with a consistent dot gain/curves, G/UCR, white point, TAC, etc. Consistency is the key.
Black type converting to gray is a strange one. There is little reason to convert K of CMYK or separation black to device gray unless your black & white printer has a problem interpreting K of CMYK or separation black as a black click. And even then, the problem is in PitStop and its color conversions. Here it would be better to use the remap color function to remap the channel to device gray rather than to convert.
In this case callas still does it better even though they use the same LittleCMS engine. It's not the engine, it's the logic running it.
The text I am referring too is usually 100% K but just happens to be on a page that needs to be converted to B&W. The 100% K turns to around 85% - 90% black unless you turn color management off.
As far the output devices we don't use any kind of proofers. We only output one-bits tiffs for the platesetters and we have adjustment curves and dot gain curves for each press. But we still do not do any kind of manual conversion between color spaces for images as we let Prinergy do all of that during refine. The conversions we do in Pitstop are usually just color to grayscale and truthfully none of the built in profiles do a good job at that. And having CM turned off doesn't do a great job converting images to gray either. Hence we get close with whatever profile looks best and then adjust it from there with curves or brightness/contrast with Pitstop.
Topic: Global Change: Convert to Color Space