| 摘要 |
Imagewise exposed and developed black and white or color silver halide photographic elements are effectively bleached using a non-rehalogenating peroxide bleaching composition. This bleaching composition comprises hydrogen peroxide, or a precursor that can release hydrogen peroxide, and has a pH from 2 to 6, and at least one compound of Formula I:R-(O)n-SO3M(I)wherein R is a group having 1 to 10 carbon atoms; n is 0 or 1; and M is a hydrogen atom, an alkali metal, an alkaline earth metal or an ammonium ion. Moreover, the bleaching composition is substantially free of rehalogenating agents, as well as complexes of a high valent metal ion and a polycarboxylic acid, an aminocarboxylic acid or a phosphonic acid.
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