Re: CIELab solid ink values confusion
Re: CIELab solid ink values confusion
- Subject: Re: CIELab solid ink values confusion
- From: Mike Eddington <email@hidden>
- Date: Mon, 9 Feb 2009 08:42:04 -0500
>Watching the "G7 Update" recorded webinar from Idealliance's
Website, I noticed some of the SWOP No3 Solid CIELab values in the
video don't match the values in the ISO 12647-2 chart in the most
recent G7 "how to."
Note that ISO paper type #5 is actually an uncoated paper, so this
would not be a 1 to 1 comparison with a US coated #5. Consider the
SWOP2006 data sets separate from the ISO 12647-2 targets for the
associated paper type (though this would not apply for the
Gracol2006_caoted1 data set, which matches ISO 12647-2 solds for type
#1 paper). Suffice to say that the SWOP #3 & #5 data sets are based
on, and verified with actual pressruns.
>Out on press during a calibration run, should I target the ISO
12647-2 CIELab solids for No5, or should I target the ICC profile's
Lab values? My proofs will be ink jet and simulate the
SWOP2006_Coated5v2 profile.
I would definitely recommend targeting the SWOP specifications (i.e.
the solid values incorporated in the SWOP2006_Coated5 data set) over
the ISO #5 uncoated solids.
Mike
Michael Eddington
QA Manager
North American Color, Inc.
www.nac-mi.com
www.nac1to1.com
www.photo360.com
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