Thanks Tomaso
1) "Black and white" adjustement works well. Unfiortunately, after I update all grey objects in K Only, I need to select several objects to bring colors. And I cannot separate all the grey layers having the adjustement and add above the colored objects. So Seems that I cannot use this solution.
2) I discovered the K Only Button on Publisher, indeed but seems it only apprear for photo, not for vector objects. I miss something?
In attachment, an example of what I receive, and what I need to produce if that can help to understand my need.
Thanks for your support
K-only then color.afdesign