4 Correct answers
That’s (in part) what GCR is for (also UCR) and is part of CMYK ICC-Profiles.
If you can’t find an existing profile for the print condition that meets yout TAC-needs (Total Area Coverage) and need to edit or create ICC-Profiles you will likely need specialized software.
Manually faking GCR with Adjustment Layers for example does not seem exactly recommendable.
In my experience most art books have a run length more suitable for sheet-fed presses than for web. Usually, in sheet-fed, ink volume is not a major cost item. Certainly, if changed, it could affect art book image quality.
If the art book is destined for web, although ink is a cost to be considered, I would still look elsewhere for items on the cost sheet for economy. Simply, if the subject is art, each production compromise may affect sales significantly.
If you were to
...
I don't have time now for the long post this question requires and if English is not your first language it may be hard.
To start, take a look here:
https://www.colormanagement.org/en/isoprofile.html#coated_FOGRA39_GCR_bas
https://www.colormanagement.org/download_files/coated_FOGRA39_GCR_bas.zip
What you really need is to use ICC profile creation software and or ICC device-link profile creation software to create your own profiles from various characterisation or measurement data for the r
Best avoid the old, CMYK engine like the plague. Yes, you can 'edit' those parameters but they are nothing like what a specific ICC profile provides, nor are they based on the data that was used to build such profiles like FOGRA 51.
You'd need some profiling package and measured data that mimics the target printing you desire and use it to alter UCR/GCR.
See:
Explore related tutorials & articles
11
Replies
In my experience most art books have a run length more suitable for sheet-fed presses than for web. Usually, in sheet-fed, ink volume is not a major cost item. Certainly, if changed, it could affect art book image quality.
If the art book is destined for web, although ink is a cost to be considered, I would still look elsewhere for items on the cost sheet for economy. Simply, if the subject is art, each production compromise may affect sales significantly.
If you were to choose Edit > Color Settings > CMYK > Custom CMYK you would see the difference in Gray Ramp as you go from the default of Medium to Heavy. (Note: Although total ink limit in the illustration is set to 300% rather than your 320% the effect in the ramp shape is unaffected.)
Oddly enough, if the art consists of photographs and includes flesh tones -- portraits, for example -- I have found it helpful to change the GCR from Medium to Light. If you notice, that change introduces the black at about 50% and is less likely to be part of the caucasian flesh tone mixture.
Thanks Norman.
I work in art's book's and catalogs project (paintings, photography, sculpture, etc) that they will be printed in OffSet CMYK analog.
What I have to do is to reproduce as good/similar as possible the original image or 'painting'. In general, I have to use a specific ICC profile (like FOGRA 39, PSO Coated v3, or others depending on the paper we use and the place/country we do it) so I don´t know what happened if I go where you told me and change the GCR in .../Custom CMYK. When I do that looks like I change the ICC color profile. I only have a EuroStandar Coated for example, and I have to keep the PSO couted v3.
What I need is to change each % color of the CMYK (like GCR does) of my images without changing the ICC profile (Coated v3 for example). I don´t know if this is possible.
Thanks a lot all of you.
AdChoices