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When I go into channel mixer, I see sliders for each of the color channels (RGB or CMYK); these sliders are ruled from -200% to +200% for each color.
Can someone give me some info. about why the scale is to 200% both plus and minus–this doesn’t make immediate sense to me: how can you have 200% of a color and how can you have negative pixels of a color?
I’m trying to use the channel mixer to make etching-type plates using photopolymer film. I’d like to create two plates: one based on black channel info. and the other some combination of the color info. (similar to a duotone, but not exactly).
Thanks, David.
Can someone give me some info. about why the scale is to 200% both plus and minus–this doesn’t make immediate sense to me: how can you have 200% of a color and how can you have negative pixels of a color?
I’m trying to use the channel mixer to make etching-type plates using photopolymer film. I’d like to create two plates: one based on black channel info. and the other some combination of the color info. (similar to a duotone, but not exactly).
Thanks, David.
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