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- Subject: (no subject)
- From: jim rich <email@hidden>
- Date: Thu, 7 Dec 2000 14:28:49 -0500
Kinda weird and interesting.
<I also noticed that the separations he has now are all at the same angle.
I'm guessing that this is helping his contrast because I see a lot of
overprinting of dots that read as black. Will we need to continue this
practice or will I benefit from a rosette? If so anybody have any ideas what
angles would be good.>
Printing the colors at the same angle causes the color to shift if
the halftone dots do not line up in the same postion during each pass
thru the press. I think this is a bad thing especially if you are
trying to achieve consitent results. The color variation is about 50%
of the time. Technically this is termed an indefinate morie and this
technique of dot on dot printing goes back to the 1940 in the US and
Europe and if you look real close at some laser printers you will see
that this screening method is used in them.
As far as I am concerned the tradtional angles will work. But take
advantage of the black angle that way you will have 30 degrees
between each color.
If the guy is convinced to print all colors at the same angle they
try using different screen rulings.
Good luck
Best Regards
Jim Rich
Rich & Associates, LLC
P.O. Box 70882
Chevy Chase MD 20813
301-652-7266
301-652-8665 fax
email:email@hidden