Hydrolyzable diffusion control layers in photographic products

Details Hydrolyzable diffusion control layers in photographic products Hydrolyzable diffusion control layers in photographic products

G - Physics

03

C

96/25

G03C 1/40 (2006.01) G03C 8/54 (2006.01)

Patent

CA 1219759

HYDROLYZABLE DIFFUSION CONTROL LAYERS IN PHOTOGRAPHIC PRODUCTS ABSTRACT Photographic diffusion transfer film units in- cluding polymeric diffusion control layers are disclosed. The diffusion control layers comprise polymers which are hydrolyzable in an alkaline medium so as to convert a layer comprising one or more of the polymers from a con- dition of impermeability to alkali or materials soluble in or solubilized by an aqueous alkaline processing com- position to a condition of substantial permeability there- to.

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