Control of pressure-fog with gelatin-grafted and case-hardened gelatin-grafted soft polymer latex particles
AssigneeEastman Kodak Company
InventorsKevin M. O'Connor, Richard P. Szajewski, Pranab Bagchi
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Abstract
This invention describes a substantially less pressure sensitive photographic film comprising a support, at least one light sensitive silver halide element, and an overlaying element comprising gelatin-grafted or case-hardened gelatin-grafted soft polymer particle composite element. The incorporation of such an overlaying composite particle cushioning layer does not compromise either the physical properties or physical integrity of the film unit. This invention is particularly suitable for highly pressure sensitive tabular grain emulsions.
Claims31
A substantially less pressure sensitive silver halide photographic film comprising at least one light sensitive silver halide element, and at least one cushioning layer, not containing photosensitive silver halide, incorporating composite particles comprising a soft polymer core having a mean diameter from about 10 nm to 500 nm covered with a layer of gelating shell that is chemically bonded to the soft polymer particle and cross-linked with a conventional hardener to form a hard case, whose thickness is less than 10 nm wherein said cushioning layer is situated in between two silver containing color recording layers of a multilayer color photographic product.
A substantially less pressure sensitive silver halide photographic film element comprising at least one light sensitive silver halide layer a gelatin overcoat surface layer and a non-photosensitive silver halide containing cushioning layer over the upper silver halide layer and under said gelatin overcoat, said cushioning layer incorporating composite particles comprising a soft polymer core having a mean diameter from about 10 nm to 500 nm covered with a shell of gelatin that is chemically bonded to the soft polymer particle and cross-linked with a conventional hardener to form a hard case whose thickness is less than 10 nm.
Dependencies are inferred from the claim text.