Re: Newsprint G7 calibration
Re: Newsprint G7 calibration
- Subject: Re: Newsprint G7 calibration
- From: Roger Breton <email@hidden>
- Date: Sat, 24 Mar 2007 15:57:02 -0400
Bill-
> The G7 methodology defines the solid overprint of C, M and Y to be
> perfectly neutral (NPDC). When that isn't the case (which is most of
> the time), 100% C, M and Y will map to some other values.
Do you mean to say that 100c100m100y is not meant to stay 100c100m100y after
applying "normal" calculated G7 curves?
Wow, call me shortsighted or uneducated but that is one show stopper. The
way I understood the present Training How to, I was under the impression
that one merely pinned the 100c100m100y ISO-Visual StatusT density to the
nearest pre-established NDPC curves Y intercept? And that only the points
between 100c100m100y and the substrate could every be managed by the
calculations. Have I got that part wrong?
> If you want to use the NPDC idea, the best approach is to make two
> sets of curves, one using NPDC and the other using TVI. Then, blend
> these curves together, with 100% NPDC and 0% TVI in the highlights,
> changing smoothly to 0% NPDC and 100% TVI in the shadows. This will
> give you control of gray balance in the highlights and midtones,
> where it matters, while preserving the integrity of the shadows.
Nothing that can be done with canned G7 software presently?
Unless I missed that altogether -- I think I need a drink :(
> I can provide some examples, if you're interested.
Absolutely!
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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