Patent ID: 7452661

Claim:
A black-and-white photothermographic material comprising a support and having on at least one side thereof a photothermographic emulsion layer and comprising, in reactive association: a. a photosensitive silver halide, b. a non-photosensitive source of reducible silver ions, c. a reducing agent for said reducible silver ions, d. a non-hydrophilic binder, and e. one or more compounds from one or more of the following compound groups e-i), e-ii), and e-iii) that are present in a total amount of at least 5×10 −6 mol/m 2 : e-i) zinc salts of aryl sulfonic acids or of a fluorinated C 2 -C 6 carboxylic acids, e-ii) non-encapsulated alkali metal salts of aryl sulfonic acids or of fluorinated C 2 -C 6 carboxylic acids, with the exclusion of sodium benzenesulfonate and sodium triisopropylnaphthalenesulfonate, or e-iii) fluorinated C 2 -C 6 carboxylic acids, provided that said photothermographic material contains no compounds with a cyclic acid anhydride group and no non-polymeric compounds with acetal groups.