发明授权
- 专利标题: Formation of tabular silver halide emulsions utilizing high pH digestion
- 专利标题(中): 使用高pH消解形成片状卤化银乳剂
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申请号: US452487申请日: 1989-12-19
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公开(公告)号: US5013641A公开(公告)日: 1991-05-07
- 发明人: James R. Buntaine , Robert V. Brady
- 申请人: James R. Buntaine , Robert V. Brady
- 申请人地址: NY Rochester
- 专利权人: Eastman Kodak Company
- 当前专利权人: Eastman Kodak Company
- 当前专利权人地址: NY Rochester
- 主分类号: C01G5/02
- IPC分类号: C01G5/02 ; G03C1/00 ; G03C1/005 ; G03C1/015 ; G03C1/035 ; G03C1/07 ; G03C5/16
摘要:
The invention is generally accomplished by providing a tabular silver halide emulsion formation process in which the pH is controlled to greater than 9 by the addition of an alkali base prior to digesting to form uniform nucleated silver bromide particles. In a particularly preferred process the emulsion is adjusted to a pH greater than 9 by the use of sodium hydroxide, digestion takes place in between 3 and 7 minutes, and the emulsion making is completed in less than 100 minutes without the use of ammonium hydroxide. The emulsions formed are suitable for x-ray films and produce the image tone required by radiologists.
公开/授权文献
- US4488488A Warhead safety and ribbon chute holder 公开/授权日:1984-12-18
信息查询
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