I found this...

http://www.californiahistoricalsocie...criptions.html

Dye coupler photoprints
Most color photoprints (except instant camera) made since 1941 are included. Commonly referred to as Type C if made from a negative and Type R if made from a transparency. A chromogenic development process.

Dye destruction photoprints
Color photoprints made under various trade names including Utocolor in the early 1900s and Gasparcolor in the 1930s. Cibachrome, introduced in 1963, is the modern representative of this process. Valued in part for the relative stability of the color dyes.
joe