Re: US Sheetfed Coated v2 TR001?
Re: US Sheetfed Coated v2 TR001?
- Subject: Re: US Sheetfed Coated v2 TR001?
- From: Roger Breton <email@hidden>
- Date: Fri, 09 Apr 2004 11:28:25 -0400
>
And I guess we have the "official" answer from Adobe: it wasn't a press
>
run at all but simply an analog Matchprint on Commercial base that they
>
profiled!
Imagine.
>
I've run into that myself when calibrating/profiling a press that runs
>
the typical KCMY (K first, Y last) sequence. The yellow ink train tends
>
to get contaminated pretty quickly, especially if the ink fountain
>
starts to run low.
I profiled a brand-spanking new Heidelberg CD102 recently and the pressman
told me that, unless the press has been washed fresh, yellow always gets
contaminated with time. And you know how printers sequence jobs to avoid
washup? So what do you think typically happens to yellows: we decided to
profile with the contaminated yellow.
>
The other possibility is that the screening they
>
used had a higher screen ruling on the yellow angle. This is VERY
>
typical. Rampage's RCS and Harlequin's Precision Screening both will
>
run the yellow at roughly 10% higher linescreen than the other angles
>
resulting in higher yellow dot gain than expected. Not a problem if you
>
compensate for this in the plate curves.
Would 10 lpi more account for a 3-5% dot gain variation?
>
BTW, I profiled a 6-color Komori just last week that ended up matching
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TR004 better than DTR004 does! Gray balance came out spot-on at
>
50c/40m/40y.
At what SID I was going to ask...
>
We simply ran to GRACoL SIDs, adjusted the plate curves to
>
hit the recommended dot gain and we nailed it. Virtually the same thing
>
happened with the uncoated stock press run.
Sounds too good to be true?
>
Later,
>
Terry
All the best,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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