Re: Info on NCP profiles
Re: Info on NCP profiles
- Subject: Re: Info on NCP profiles
- From: Graeme Gill <email@hidden>
- Date: Tue, 29 Apr 2003 11:56:39 +1000
email@hidden wrote:
>
vector uses. A proper usage would be for a RIP or Color Server to intercept a
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PostScript or PDF file with a font or other graphic area defined as Pantone
>
393, and instead of using the canned color definition of that color in RGB or
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CMYK from the source, to trash those values and replace them with the
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licensed Lab values (from Pantone in this instance) for that color, in
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relation to the device profile. This allows defined SWOP and other color
This is what the Colorbus RIP does for instance. Three different spot
color library formats are supported (including ICC), allowing Pantone
licensed libraries to be used by the RIP, as well as user created custom
libraries. Multiple spot libraries can be used at once in a specified
priority order.
>
Servers. Since it happens blind on the fly, it needs to be carefully tested
>
with all file types that may be encountered before being implemented into a
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proofing (or printing) workflow. One test is to replace the CMYK values of a
What we've done is to add two optional flags to the printer config,
one that turns on a log message when a named color is matched, and
the other to log a message when a named color is not matched. This
eases checking that the named colors are being handled properly,
and alows custom colors to be added as needed for particular jobs
(useful when spot planes are being recombined in the proofer product).
Because the named colors are interpreted as CIE color specifications
(rather than device values typical of the spot color handling in
desktop utilities), all the benefits of getting the maximum gamut
from the printing device, as well as calibration are retained.
Graeme Gill.
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