3M Posi-Tone
Description
“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 possibility of manufacturing and marketing a silver dye-bleach color printing material on a large scale.21 No consumer product came out of this agreement, but 3M later developed 3M Posi-Tone, a silver dye-bleach continuous tone color-proofing material for the printing industry. This material was only available in 1965–66 (Friedman 1968: 529). Gaspar eventually abandoned his efforts to commercialize his invention but continued to do research at Gaspar Laboratory in Beverly Hills, California, until his death in 1973.”
(Pénichon, Sylvie (2013): Twentieth Century Colour Photographs. The Complete Guide to Processes, Identification & Preservation. London, Los Angeles: Thames & Hudson, on pp. 213–214.)
Secondary Sources
Pénichon, Sylvie (2013): Twentieth Century Colour Photographs. The Complete Guide to Processes, Identification & Preservation. London, Los Angeles: Thames & Hudson, on pp. 212–214. View Quote
