Re: Changing black generation in standard profiles
Re: Changing black generation in standard profiles
- Subject: Re: Changing black generation in standard profiles
- From: "Roberto Michelena" <email@hidden>
- Date: Sat, 27 May 2006 09:11:34 -0500
For some of the standard printing conditions there's data available to
download: ISOCoated (from Fogra's website), Gracol v7 (from Gracol's
website).
Inside some of the profiles you can find embedded the measurements
file, and some tools (for example Gretag's MeasureTool) allow you to
"open" a profile and extract the data provided it's there.
And finally, for any profile, you can recreate the data (with some
loss but not significant) by using Gretag's freeware ColorLab. You
open a target reference file (in CMYK) as for example ECI2002. Then
you go to the "Filter" menu and there you find "ICC Profile
Conversion"; you select the ICC profile in question, select "absolute"
mode and destination Lab. This will yield the Lab version of the
chart, which you can then "save as" and use in ProfileMaker, or after
some easy file reformatting, in PrintOpen. It can also be used in
Monaco but it takes a little more fiddling with the text formatting.
-- Roberto Michelena
Infinitek
Lima, Peru
On 5/27/06, Marco Ugolini <email@hidden> wrote:
Dear friends and colleagues,
Does anyone have any pointers on how to generate versions of standard
profiles -- like US Web Coated (SWOP) v2, or US Sheetfed Coated v2, etc --
in which the black generation is higher than is currently the case?
>From a cursory analysis of the neutral rendition of these standard profiles
as viewed in ColorShop X, black generation starts around 35-40%, proceeding
according to what looks like light GCR.
So, what can one do if one wishes to increase the black generation in order
to make it easier to keep neutral tones neutral on press? Is there such a
thing available somewhere as a measurement data file (colorimetric or
spectral) from which to produce a version of a standard profile with higher
GCR using ProfileMaker, for instance?
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