Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1999-11-02
2000-08-08
Chea, Thorl
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430567, 430607, 430613, G03C 100
Patent
active
061000205
ABSTRACT:
The present invention relates to a process for the manufacturing of a silver halide element comprising a silver halide emulsion-making step, a chemical or optical sensitization step, and a silver halide emulsion coating step, characterized in that the process comprises the step of adding to the silver halide emulsion, after the chemical or optical sensitization step and before the coating step, an aryl compound having at least two substituents each of these represented by an hydroxyl group and/or a sulfonic group in an amount of less than 0.03 moles per mole of silver. The aryl compound increases the speed to Dmin ratio when used in a silver halide element.
REFERENCES:
patent: 5028520 (1991-07-01), Ito
patent: 5576170 (1996-11-01), Eikenberry et al.
patent: 5631126 (1997-05-01), Daubendiek et al.
The Condensed Chemical Dictionary, Tenth Edition, Revised by Gessner G. Hawley, p.90, 1981.
Research Disclosure No. 38957, "Photographic Silver Halide Emulsions, Preparations, Addenda, Systems and Processing," Sep. 1996, pp. 591-639.
Chea Thorl
Eastman Kodak Company
Tucker J. Lanny
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