To Photo Engineer. Many thanks for info on Kodacolor. J. Coote states in his book "The Illustarted history of Colour Photography" C-22 was used for Kodacolor film since 1942 (p-158). If this is incorrect it would be interesting to know how the earlier process differed from the later named C-22. I remember processing Agfacolor CN17 film back in 1969 with a 15 min. wash after the intermediate bath.I can't imagine the mask in Kodacolor would have made much difference in colour correction, although some references state it was to correct for the unwanted blue absorbtion of the cyan and magenta dyes of the kodacolor negative.D-165 was a soft working developer of that time, but I don't know what developer Kodak actually used.