发明授权
US5411852A Class of grain growth modifiers for the preparation of high chloride
(111) tabular grain emulsions (II)
失效
用于制备高氯化物(111)片状颗粒乳剂(II)的晶粒生长改性剂类别
- 专利标题: Class of grain growth modifiers for the preparation of high chloride (111) tabular grain emulsions (II)
- 专利标题(中): 用于制备高氯化物(111)片状颗粒乳剂(II)的晶粒生长改性剂类别
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申请号: US281283申请日: 1994-07-27
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公开(公告)号: US5411852A公开(公告)日: 1995-05-02
- 发明人: Joe E. Maskasky
- 申请人: Joe E. Maskasky
- 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: G03C1/015
- IPC分类号: G03C1/015 ; G03C1/005 ; G03C1/035 ; G03C1/07
摘要:
A process is disclosed of preparing a high chloride {111} tabular grain emulsion. Tabular grains are formed having {111} major faces, containing at least 50 mole percent chloride and less than 5 mole percent iodide, based on silver, and accounting for at least 50 percent of total grain projected area by introducing silver ion into a gelatino-peptizer dispersing medium containing a stoichiometric excess of chloride ions with respect to silver ions and a phenol that is incapable of reducing silver chloride and has at least two iodo substituents, which acts as a grain growth modifier.
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