“Probably the first use of the catalytic property of silver was in 1889, when E. Howard Farmer disclosed the action of a silver image upon strong dichromate solutions (Eng. P. 17773/89). When a plate or film, containing a silver image, is immersed ...

Karl Schinzel proposed a multi-layered monopack for still photography, based on the principle of the dye-bleach process which was later elaborated to a practical application with Gasparcolor.

Gasparcolor was the first three-color multi-layer monopack film available for practical use. It was a double-coated print film with a cyan layer on one side and two layers dyed magenta and yellow on the other side (see illustrations).

“In 1944 he launched a new reflection printing material on a white-pigmented acetate base called Gasparcolor Opaque, which was, initially and for the duration of the war, available only to the U.S. military. The processing of Gasparcolor Opaque ...

“In November 1953 Ilford Limited of London launched a mail-order service to supply color prints from 35mm transparencies using Ilford Colour Print, a silver dye-bleach printing material on white-pigmented cellulose triacetate support (Fig. ...

“The materials and processes described thus far have been either unsuccessful or short-lived for one reason or another; the trend changed with the launch of Cibachrome in the 1960s. The product and its subsequent forms dominated the silver ...

“In 1956, after the failure of the French venture, Gaspar resumed his own production of printing materials and chemicals (Koshofer 1981a). In the late 1950s he entered into an agreement with 3M Company of St. Paul, Minnesota, to explore the ...

“Between 1970 and 1976, Agfa-Gevaert produced its own silver dye-bleach printing material on a white-pigmented acetate base called Agfachrome CU 410.28 Only available to a few photofinishers in Germany, it was used to print amateurs’ ...