Low silver wash-off film containing pretreated carbon black

Details Low silver wash-off film containing pretreated carbon black Low silver wash-off film containing pretreated carbon black

G - Physics

03

C

96/100, 96/113

G03C 5/315 (2006.01) G03C 1/95 (2006.01)

Patent

CA 1123648

ABSTRACT OF THE DISCLOSURE In a light-sensitive material for tanning development containing unhardened or only slightly hardened gelatin silver halide emulsion layers, the silver content required to obtain maximum density is reduced by incorpor- ating carbon black pretreated with water-miscrible compounds which have a higher affinity for carbon black than gelatin. Suitable treatment may be provided by at least two of the following: poly-n-vinyl lactams, polyalkylene oxide deriva- tives, water-miscible compounds containing at least two OH groups, and polyalkylene oxides with a molecular weight of at least 400.

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