Thermographic and photothermographic materials having silver salt complexes therein
AssigneeMinnesota Mining and Manufacturing Company
InventorsJohn M. Winslow, Donald H. Klosterboer
Life of this patent
Estimating the term…
Abstract
Thermographic and photothermographic materials are provided by using organic or inorganic silver salts complexed with coordinating compounds having a gross stability constant between 4.50 and 10.00. When the complexed silver salt is in catalytic proximity to photosensitive silver halides, photothermographic elements are produced.
Claims14
A thermographic recording medium comprising at least one layer comprising a binder, a reducing agent, and at least one silver salt complexed by at least one coordinating compound having a gross stability constant between 4.50 and 10.00 wherein at least 90% of all silver salt, excluding silver halide, within said layer is in the form of a silver salt complex with said at least one coordinating compound.
A photothermographic recording medium comprising at least one layer comprising a binder, a reducing agent, and at least one silver salt complexed by at least one coordinating compound having a gross stability constant between 4.50 and 10.00, wherein at least 50% of all silver in said layer is in the form of a silver salt complex, wherein at least 90% of all silver salts excluding silver halide is in the form of a silver salt complex with said at least one coordinating compound, and wherein 0.25-50.0 mole percent of silver halide/total silver in said medium is present in catalytic proximity to said complexed silver salt.
Dependencies are inferred from the claim text.