Quote Originally Posted by mdm View Post
C=15o M=75o Y=0o K=90o for no reason other than that is the default.
Arylimid Yellow, Quinacridone Magenta, Copper Phtalocyanine.
45 deg is considered the "prime angle" as it is the least offensive to the eye and is usually reserved for the Black plate.

I've tried halftoning with carbon with varied results; high-contrast tissue and a hard dot negative = okay. The soft dot of inkjets can cause dot gain/etch issues which then demands VERY consistent exposure and processing of the carbon tissue.

If you can get negs ripped on an imagesetter with accurate screen angles + frequencies, life will be much easier. It only takes a 1/2 dot misregistration to switch from solid to open centred rosettes.

Several years of prepress and hand-coding postscript taught me this the hard way