发明名称 |
Method for chemically sensitizing silver halide photographic emulsion |
摘要 |
A method for chemically sensitizing a silver halide photographic emulsion with a selenium compound is disclosed. The sensitizing method comprises the steps of preparing a dispersion of solid particles of a selenium compound in an aqueous medium by a process comprising the following steps of (1) dissolving a substantially water-insoluble organic selenium compound in a substantially water immiscible low-boiling organic solvent to prepare a selenium compound solution, (2) dispersing the selenium compound solution in water or an aqueous solution of a dispersing aid to form a oil-in-water type dispersion, and (3) removing the organic solvent from the oil-in-water type dispersion by stirring the dispersion under a decompressed condition to precipitate the selenium compound so as to form a dispersion of fine solid particles of the selenium compound having an average particle size of 10 nm to 3 mu m; adding the solid dispersion particles of the selenium compound to a silver halide emulsion, and ripening the silver halide emulsion in the presence of the solid dispersion particles of the selenium compound.
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申请公布号 |
US5679507(A) |
申请公布日期 |
1997.10.21 |
申请号 |
US19950519695 |
申请日期 |
1995.08.25 |
申请人 |
KONICA CORPORATION |
发明人 |
YOSHIDA, TETSUYA;ICHIKAWA, KAZUYOSHI;MASUTOMI, HARUHIKO;KAWAHARA, YUSUKE;KASHIWAGI, HIROSHI |
分类号 |
G03C1/015;G03C1/005;G03C1/025;G03C1/06;G03C1/09;G03C1/18;G03C5/17;(IPC1-7):G03C1/09 |
主分类号 |
G03C1/015 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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