RE: CMYK separations on Adobe Photoshop

Its because the RGB colours are additive and the CMYK
subtractive......thats why you use CMY filters in colour photography
when using RGB negatives.
Kate

-----Original Message-----
From: Judy Seigel [mailto:jseigel@panix.com]
Sent: Sunday, 31 October 2004 11:21 a.m.
To: alt-photo-process-l@sask.usask.ca
Subject: RE: CMYK separations on Adobe Photoshop

On Sat, 30 Oct 2004, Kate M wrote:

> You print the Red channel with cyan, the Green with Magenta, and the
> Blue with Yellow. It sounds crazy but it's true!!!

I think what may be confusing is that the RGB separations are negatives,

or more familiarly "complements." So they're printed with the
complementary color, as above. (Of course these aren't exactly the
"complements" they taught us in Art 101, but they work for repro, tho I
forget why... as I recall it's because it's projection, not reflection
(?)

Judy

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