Re: Preserving the black channel
Re: Preserving the black channel
- Subject: Re: Preserving the black channel
- From: Henrik Holmegaard <email@hidden>
- Date: Sun, 14 Apr 2002 09:01:08 +0100
email@hidden (Lee Blevins) wrote:
We are using inkjet (hp5000) for graphic arts proofing.
We rip our files in our rampage and output a large contone (cmyk) to
print.
Problem is,
Black only halftones come out in 4C.
Using Postershop, Monaco Proof.
Because the color of the black ink in the simulation profile for the
offset process is different from the color of the black ink in the
destination profile for the 5000, it is technically correct to match
incoming K 100% to composite CMYK black.
Color servers like iQueue and Helios as well as many RIPs have a
switch that disables matching for R0 G0 B0 and K 100%. However, if
you define pure black as L 100 a0 b0 then by the nature of the game
you are saying that your blacks must be matched to composite CMYK
black.
You should look for the appropriate switch in the ICC frontend of
your RIP, or if you cannot find it then disable ICC conversions in
the ICC frontend of your RIP and use an ICC color server to feed it
instead. I don't know the Rampage product and can only explain what
functionality you should be looking for from the point of view of the
ICC framework as such.
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