U of S | Mailing List Archive | alt-photo-process-l | Re: again on color absorption

Re: again on color absorption

Katharine, IIRC, the portion below the dashed line (pure color) would be
less colored ink(s) + more black ink (due to less lightness/brightness -
depending which test pattern is used) as you progress more to bottom.
Now I am undestanding...
my understanding of Alberto's test would be that black ink isn't as opaque
to the specific light which that specific process requires as some other
colored inks, that's why there's reintroduction of tone. This is something
I experienced with Epson 890/1290 OEM dye-based inks and HP9180
pigment-based inks.
You are right, the mixing of colour with black decreases the amount of both. The absorption of pure black is in the last row, which is a little denser (absorbing less) than pure green.