Method of making flowable alkaline thiosulfate/alkaline sulfite and the product thereof
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Claims
3. A flowable powdered mixture as claimed in claim 2, wherein said alkaline sulfite is selected from the group consisting of hygroscopic ammonium sulfite and hygroscopic potassium sulfite.
4. A flowable powdered mixture as in claim 2, further comprising an alkali metal bisulfite.
5. A flowable powdered mixture as claimed in claim 2, further comprising a hygroscopic alkaline thiosulfate.
8. A flowable powdered mixture as claimed in claim 1, further comprising a powdered photographic bleaching agent.
9. A flowable powdered mixture as claimed in claim 8, wherein said photographic bleaching agent comprises a ferric complex of an aminopolycarboxylic acid.
12. A method as claimed in claim 11, wherein said hygroscopic alkaline thiosulfate is selected from the group consisting of ammonium thiosulfate and potassium thiosulfate.
19. A method as claimed in claim 13, wherein said alkaline sulfite comprises ammonium sulfite monohydrate, and wherein said method comprises admixing said ammonium sulfite monohydrate within alkali metal metabisulfite in an amount effective to stabilize said ammonium sulfate monohydrate.
20. The product of the method of claim 11.
21. The product of the method of claim 17.
22. The product of the method of claim 19.
25. The product of the method of claim 23.
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Type: Grant
Filed: Jul 5, 1996
Date of Patent: May 12, 1998
Assignee: Fuji Hunt Photographic Chemicals, Inc. (Paramus, NJ)
Inventors: Hongzoon Kim (Boonton, NJ), Charles J. Pfeiffer (Wayne, NJ)
Primary Examiner: Hoa Van Le
Law Firm: Burns, Doane, Swecker & Mathis
Application Number: 8/676,063
International Classification: G03C 538;
