Back to results
US 5,512,415 AGranted
High contrast photographic silver halide material
AssigneeEastman Kodak Company
InventorsAllison H. C. Dale, Roger H. Piggin, Michael B. Ledger, David Beaumond
Life of this patent
Estimating the term…
Abstract
A high-contrast photographic element, adapted for use in the field of graphic arts, includes a hydrazide nucleator and an amine booster and comprises a silver halide emulsion layer which is capable of forming a latent image under conditions of use and a second silver halide emulsion layer which is not capable of forming a latent image under conditions of use.
Claims10
A high-contrast photographic element which is developable at a pH of below 11 and adapted for use in the field of graphic arts;
- said photographic element comprising a support bearing a high-contrast silver halide emulsion layer which is capable of forming a latent image under conditions of use and, in said emulsion layer or an adjacent hydrophilic colloid layer, a hydrazide nucleating agent and an amine booster;
- and said photographic element additionally comprising a second silver halide emulsion layer which is not capable of forming a latent image under conditions of use;
- both silver halide emulsion layers contributing to the visible silver image formed by exposure and processing of said photographic element.
Dependencies are inferred from the claim text.