Patent ID: 6645709
Filing Date: 2003-11-11
Classification: G03C

Abstract:
A aqueous photographic color developing composition having a pH of from about 7 to about 13 and comprising:a) at least 0.0005 mol/l of a color developing agent, b) at least 0.0005 mol/l of an antioxidant for said color developing agent, c) from about 1 to about 25 g/l of a first calcium ion sequestering agent that is a polycarboxylic acid or salt thereof having a molecular weight of from about 2000 to about 10,000, and d) at least 0.0005 mol/l of a second calcium ion sequestering agent that is a non-polymeric aminocarboxylic acid, polyphosphonic acid, or a salt thereof, wherein the weight ratio of said first calcium ion sequestering agent to said second calcium ion sequestering agent is from about 1:1 to about 20:1.