Photographic reversal process prebleach concentrate and method o

Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...

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430407, 430427, 430428, 430429, 430430, G03C 746

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058374329

ABSTRACT:
A conditioning or bleach accelerating solution is prepared by diluting a concentrate up to 25 times. The concentrate contains a formaldehyde bisulfite precursor salt at from 200 to 600 g/l, sulfite ions at 0 to 200 g/l, a bleach accelerating agent at from 1.5 to 25 g/l, and a metal ion chelating agent present at up to 60 g/l. The concentrate is free of sodium ions.

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patent: 5552264 (1996-09-01), Cullinan et al.
patent: 5578427 (1996-11-01), Cullinan et al.

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