Re: Subject: Re: Color Bars on Inkjet Proofs
Re: Subject: Re: Color Bars on Inkjet Proofs
- Subject: Re: Subject: Re: Color Bars on Inkjet Proofs
- From: Terry Wyse <email@hidden>
- Date: Mon, 5 Nov 2007 10:50:12 -0500
You can pull this data directly from the (free) GRACoL2006_Coated1,
SWOP2006_Coated3/Coated5 data sets. Most standard proof verification
color bars will, or should, use a subset of patched teken directly
from the chracterization data, in this case formatted for an IT8.7/4.
If you are using a non-standard set of color bars, you can also pretty
accurately derive this data from profiles made from the
characterization data sets above.
In theory, ANY printer/media combination would "qualify" as long as
the colorimetric data on the color bar matches that of the
characterization data within a specified tolerance.
You can find everything you need at either the GRACoL (www.gracol.org)
or SWOP (www.swop.org) web sites. Probably very soon you'll see a
standard set of color bars (ISO 12647-7) published with reference data
provided for both GRACoL and SWOP data sets. It's in "beta" use as we
speak.
Regards,
Terry Wyse
On Nov 5, 2007, at 10:35 AM, Richard Booth wrote:
When you say this:
We have to acknowledge that
some proofing may strive to achieve exacting colorimetry on the
proof, like
ISO-12647-x or SWOP2006_Cx or GRACoL_x. In those instances, the
measurement
of the control strip will tell the initiated user what is the
degree of
conformance of the proof to the standard or specification in
question.
Roger Breton
does it mean there is inkjet colorimetric data that is related to
these
standards for the multitude of inkjet and substrate combinations. To
put it
another way, is there GRACoL_x conforming data for the Epson 4800 or
say the
Canon IPF5000 on, let's say, an EFI proofing paper that could be
pulled from
the patches on a control strip that would confirm compliance with the
GRACoL_x standard for that particular printing device? Yes I know
the RIP
manufacturers have been selling the SWOP branded Seal of Approval for
awhile. But if you're a printer and you get a proof from your
publisher or
ad agency client with this SWOP or Gracol branded combination of
device, ink
and paper, can you actually tell it is what it says it is from reading
patches? If the data exists for the the various combinations, where
does one
find it.
_____________________________
WyseConsul
Color Management Consulting
G7 Certified Expert
email@hidden
704.843.0858
http://www.wyseconsul.com
http://www.colormanagementgroup.com
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