I didn't see any one trying to fatten him up... :O)
I think 'copy' lenses that are known 'process' types or labeled 'APO ' are safely assumed to be well corrected for color.
Some of the stuff Surplus Shed has were literally for old pre-color photocopiers. For example, I bought two Ednalite ones, a 150 mm and 170 mm. One had a patent number, so I looked it up. 1960's photocopier application, triplet construction, two design wavelengths specified. I can't remember the wavelengths, but they were described as corresponding to some spectral lines (like 'D' line in some gaseous discharge source). I think the two wavelengths were very close together, which gave me the impression basically intended for a near monochromatic source.
Of course the above assumptions would not apply to a Ektar Copy lens, etc.
I don't know that they would all be the same animal if called 'Copy' lens.
I passed a Wray Special Copy lens on to someone else here. It turned out to be a 1:20 macro copy lens (M = 0.05). Couldn't find color info, except it was for circuit board and IC lithography reduction (non-UV we think).
