Non-toxic photographic developer composition

Details Non-toxic photographic developer composition Non-toxic photographic developer composition

G - Physics

03

C

96/58

G03C 5/30 (2006.01) G03C 5/29 (2006.01) G03C 5/305 (2006.01)

Patent

CA 2035049

The present invention discloses a non-hydroquinone and non-alkali metal hydroxide containing photographic developer composition comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, an alkali metal carbonate, and a 3-pyrazolidone compound. The composition has a pH of from 9.75 to 10.6, the developer being present in an amount of at least about 15 grams, the sulfite being present in an amount of from 2 to 20 grams, and the carbonate being present in an amount of from 15 to 30 grams, and water to 1.0 liter.

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