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.

Original Technical Papers and Primary Sources

Anonymous (1905): Schinzel: One-Plate Colour Photography. In: The British Journal of Photography, 52, August, pp. 608-609. View Quote

Aust. P. 42478/08

Secondary Sources

Coe, Brian (1978): Colour Photography. The First Hundred Years 1840-1940. London: Ash & Grant, pp. 120-121. View Quote

Cornwell-Clyne, Adrian (1951): Colour Cinematography. London: Chapman & Hall, pp. 23, 419-420 View Quote, 668, 669, 698, 739.

Friedman, Joseph Solomon (1945): History of Color Photography. Boston: The American Photographic Publishing Company, pp. 94-95 View Quote, 406. View Quote