Uvatype

“Uvatype was yet another variation of the dye imbibition process, introduced by the Uvachrome Company of Germany in 1929 (Fig. 4.12). Its inventor, the German chemist Arthur Traube, worked diligently to improve the then-available imbibition printing methods. Uvatypes were printed onto a special baryta transfer paper specifically engineered to prevent lateral dye diffusion to the extent possible. Prints were obtained by successively transferring the colors from the matrices onto the special paper. The relief matrices were produced initially with dichromated gelatin films and later also with silver halide gelatin films (Krause 1987). Being Jewish, Traube was forced to sell the company. In 1931 he left Germany and immigrated to the United States. Uvatype materials were available from the Uvachrome Company until about 1935 (Koshofer 1976a).”

(Pénichon, Sylvie (2013): Twentieth Century Colour Photographs. The Complete Guide to Processes, Identification & Preservation. London, Los Angeles: Thames & Hudson, on p. 136.)