Digital BW, The Print

> From: Steve Kale [mailto:stevekale@...]
>
> A couple more basic questions and sorry if this is fundamental \ufffdcolour
> theory\ufffd.  What about the K in your CMYK readings? I still
> struggle to think
> in RGB, let alone CMYK.  R=G=B=x gives me a dead neutral shade of grey,
> correct?  What would be warm/cool in RGB terms?

Warm vs. cool refers to the appearance under different kinds of "black box"
illumination. Ironically, what people refer to as warm color is what you get
under lower color temps, like low-power incandescents, while what people
refer to as cool color is what you get under higher color temps, like shaded
sunlight. But different color temps roughly correspond to different overall
tilts to the spectrum, so warm prints would be obtained by goosing red a bit
and backing off on the blue, and vice versa. Typically the tweaks are so
small that you may find that you only need to twiddle one or the other.
Manipulating both equally moves you on a curve that goes from bluish-cyan
through gray and back down to reddish-yellow. If you've ever seen an ab or
xy plot of the range of color temps, you'll see that it's curved.

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Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...