发明授权
- 专利标题: Elevated iodide surface laminae tabular grain emulsions
- 专利标题(中): 升高的碘化物表面片状颗粒乳剂
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申请号: US442232申请日: 1995-05-15
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公开(公告)号: US5576172A公开(公告)日: 1996-11-19
- 发明人: Myra T. Olm , Roger A. Bryant , Elizabeth K. Lelental , Sharon Gould , Sherrill A. Puckett
- 申请人: Myra T. Olm , Roger A. Bryant , Elizabeth K. Lelental , Sharon Gould , Sherrill A. Puckett
- 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: G03C1/035
- IPC分类号: G03C1/035 ; G03C1/005 ; G03C1/08 ; G03C1/09
摘要:
A tabular grain emulsion is disclosed that combines increased speed, reduced low intensity reciprocity failure, and low levels of pressure sensitivity. The tabular grains containing greater than 70 mole percent bromide and laminae located adjacent the {111} major faces each having a thickness of less than 35 nanometers and containing at least 1 mole percent higher iodide than a host portion of the tabular grains on which they are deposited. The tabular grains contain an iridium dopant capable of reducing low intensity failure in one interior grain portion and a Group 8 speed enhancing dopant present in a concentration of from 20 to 300 molar parts per million in another interior grain portion separated from the iridium containing grain portion by at least 10 percent of the silver forming the grain structure.
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