Photographic color developer compositions

Details Photographic color developer compositions Photographic color developer compositions

G - Physics

03

C

96/62, 31/79

G03C 5/30 (2006.01) G03C 7/413 (2006.01)

Patent

CA 1055763

Abstract of the Disclosure Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine salt are stabilized by incorporating therein the sequestering agent 1,3-diamino-2-propanol tetraacetic acid and a diphosphonic acid sequestering agent. Decomposition of the hydroxylamine salt, in the presenct of heavy metals such as irom which act to catalyze the decomposition, and resultant formation of ammonia is effectively prevented by the presence in the developer composition of this combination of sequestering agents. -1-

210740

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