Re: Max K generation question
Re: Max K generation question
- Subject: Re: Max K generation question
- From: Roger Breton <email@hidden>
- Date: Mon, 27 Sep 2004 08:45:11 -0400
>
> Has anyone ever attempted to "linearize" a printing press, prior to
>
> profiling?
>
>
How do you mean, Roger?
>
>
Rich Apollo
I mean find screen percentages input values that will yield a linear,
progressive (monotonic?), Tone Value Increase on the press. Sort of when you
take a look at dot gain curves on a well linearized inkjet printer. I hear
some folks in Europe go through this exercice before they try to profile a
press.
How that is done, in actual practice must not be for the faint of heart as
it requires some iterations. I hear it's easily done on a QuickMaster DI.
I'd think that this is accomplish by printing CMYK ramps, reading those with
a densitometer and let the software find a way to smooth out the bumps. Why
I think this is feasible and desirable is that I've often seen sheetfed
presses with irregular dot gain behavior. And those invariable lead to
"lots" of crossovers, IMO. If those can be weeded out or brought under some
kind of control prior to profiling I think we've put all the chances on our
side. But it does not happen to be exactly a widespread practice...
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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