Re: Black generation questions for large format inkjet
Re: Black generation questions for large format inkjet
- Subject: Re: Black generation questions for large format inkjet
- From: Roger Breton <email@hidden>
- Date: Wed, 18 Apr 2007 22:07:31 -0400
> I'm profiling a large format inkjet printer using PM 5.0 and this
> printer suffers from the "black peppering" problem: the saturated dark
> colors have a lot of grain. AFAIK, this problem is solved using the
> "black width" control. I also printed the "TAC" target from Hutchcolor
> and discovered that the maximum black is almost the same if I reduce the
> maximum K from 100 to 75% with high CMY values. As I know the deepest
> black isn't reduced so much with lowering the "maximum K" to 75%, I'm
> planning to reduce both "maximum black" and "black width" to deal with
> the black peppering problem. I'm afraid in loosing too much gamut in
> dark yellows (browns) and other important dark colors.
>
> I'm using a low CGR (CGR1), black start at 40% and I'm limiting the ink
> (each channel) in the RIP.
>
> What's the best approach to deal with my scenario ?
>
> Best regards,
> Lorenzo
Kgen in your profile does not translate 1:1 into the exact ink head output
-- it would be too easy. With CcMmYKk, you are at the mercy of the engine
driving the printer. For specifically getting rid of "peppering" there isn't
anything like Onyx Postershop. It's (v6.5) Total ink Limit tables are
unmatched. But you may not want Postershop for other reasons.
What did you say is your current RIP?
Roger Breton | Laval, Canada | email@hidden
certified color management enthousiast
http://pages.infinit.net/graxx
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