Re: Posterization in a Press Profile?
Re: Posterization in a Press Profile?
- Subject: Re: Posterization in a Press Profile?
- From: Steve Upton <email@hidden>
- Date: Fri, 2 Oct 2009 12:47:25 -0700
At 1:00 PM +0200 10/2/09, Paul Foerts wrote:
>
>This is indeed very true...
>
>A press cannot be characterized or profiled.
unless we are talking about different things, I'm going to have to disagree.
>Only printing conditions can be
>characterized/profiled.
Printing conditions are specifications written on a piece of paper than prepress and a press operator follow in order to print. The prints created by said press operator can be measured and profiles can be built. So I think we must be talking about different things here.
>(A press offers uncountable conditions)
>So why not target a standard printing condition? Good profiles are freely
>available. (Manually tuned and tested and still tested and retuned...).
Yes, but those 'standard printing conditions' are data sets that were derived from prints obtained from real press runs. Granted for characterization data sets like GRACoL, SWOP, FOGRA, etc they have undergone a lot of averaging and smoothing but they are still from presses.
>Custom printing conditions should only be used in closed-loop situations
>where ideally only one party is controlling the process.
>Process control is the key.
well I can't disagree with that!
But profiles built from presses running (or at least aiming) at known print specifications and/or standards still have a number of uses: they can produce more accurate proofs, they can simulate different paper/media conditions than those in the spec, etc. There are a number of "current" specs that are based on paper that is no longer available. In the case of the OP, it sounds like some if their substrates may have included board stock and CDs. Profiling these conditions can produce better separations as well.
Also, for many printers, "standard" printing conditions don't exist or are undesirable. Flexo, screen, wide gamut inks and numerous other "press" printing conditions haven't been standardized enough for color sets to be available. Profiling these conditions is not without its challenges but it's possible and valuable.
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o email@hidden 206.985.6837
________________________________________________________________________
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