Attention!, those numbers are not specially the one you need to get proper gray balance! It depend on you paper, inks, etc.
Make sure that if you do use those numbers, you get good gray balance at the same time.
Louis Dery
TGLC inc.
PerfX Press Curves™
Quote:
Originally Posted by billzeeabob
We have gone through the exact same thing as you.
A 50% K in the file should be about 68% dot area on the paper. Why? Because that is the way it always has been and everything is built around it.
You should linearize your CTP (i.e. 50%=50%), turn off any colour managment and run a calibration sheet at your standard densities. On the chart, you should have steps from 0 to 100% for each channel which correspond to the adjustment points in your RIP's curves. We target the following at 50%:
C: 63.0%
M: 64.5%
Y: 65.5%
K: 68.0%
We picked these numbers from some GRACoL literature on G7. They work pretty good. You could have CMY all the same if you wish but K should be highest.
Bill
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