Re: The GRACoL method
Re: The GRACoL method
- Subject: Re: The GRACoL method
- From: Terry Wyse <email@hidden>
- Date: Sat, 3 Feb 2007 18:30:54 -0500
On Feb 3, 2007, at 10:43 AM, Roger Breton wrote:
I'm just curious what kind of TVI you end up with once calibrated
with G7?
About the same as SWOP if you're aiming for SWOP SIDs but the TVI is
a bit lower if you're aiming more for ISO 12647-2 SIDs/Lab. The point
is that the tone curve (NPDC) is identical.
I understand the gist of the method does not revolve around TVI --
far from
it -- but, once a press is in that golden G7-calibrated state,
which is, for
all intents and purposes, according to humble tests, the same as
linearizing
a proofer for gray balance (ends up with linear L* between dMax and
dMin
with respect to CMY and K), what happens with the zillions of CMYK
images
that are separated for the standard, pre-SWOP11 TVI aims, when they
hit the
press: are they going to register lighter, darker or what?
The overall tone curve/NPDC is VERY similar for the new G7 SWOP2006
aims as compared to SWOP TR001 so legacy SWOP separations should
print just fine under the newer SWOP2006 specs. If they are printed
commercial sheetfed (GRACoL2006_Coated1) they should also print just
fine since they share the same tone curve albiet with slightly higher
SIDs. Same tonality and gray balance but with perhaps slightly more
saturated primaries/secondaries and greater dynamic range.
Regards,
Terry Wyse
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