Hello, i make the example of my problem:
1- I have a yellow image that i want to print for make cmyk sum after
2- I choose the yellow pant cYmk as 100% and put in print with photoshop
3 PROBLEM- The print have printed his yellow (with Dithering) with adding microts of other colors.
How to say to the printer via photoshop (or other programs) to use only the Yellow he got and print only that without any other color "intromission" ?
(Not problem if the yellow doesn't match with the yellow on the screen, i need pure yellow to make print tests)