I have MS Picture Manager loaded on my laptop, which has a nice feature
that allows you to readjust the color balance by selecting a portion that
you want to appear as white. When I scan, I leave a strip of the scanner
lid in, select for that (sometimes for all the new images at once) and do a
rough adjust. But, like Angelic-lair, I sometimes find it necessary to
fiddle with the scans to make them look more like the cel (usually upping
the contrast a little).
It is interesting that the subtle airbrushed blush didn't scan at all. You
might try Nene's trick of using a different colored background, black, or
maybe dark red.
Once I had a plain green background behind a cel that kept scanning
black. Someone told me that it was too close to the color of money, and
that the scanner had been preprogrammed to reject that specific shade
to foil counterfeiters. So I'm sure scanners are much more complicated
beasts than we give them credit for being.
Maybe money is pink in the country where your scanner is made?
