发明名称 |
Wash-off film containing synthetic amphoteric polymers |
摘要 |
Sharper edges are obtained in silver halide wash-off films for tanning development when from 5 to 60% of the unhardened gelatin binder in one or more layers is replaced with a synthetic amphoteric polymer consisting essentially of at least one of each of three constituents: (a) carboxylic acid, (b) alkyl primary amine, and (c) secondary and/or tertiary amine, the amphoteric polymer having an isoelectric point of from 4 to 8.
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申请公布号 |
US4735887(A) |
申请公布日期 |
1988.04.05 |
申请号 |
US19860879400 |
申请日期 |
1986.06.27 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
FOSS, ROBERT P.;FRUGE, DANIEL R. |
分类号 |
G03F7/06;C09H7/00;G03C1/005;G03C1/04;G03C1/053;G03C5/315;(IPC1-7):G03C1/06 |
主分类号 |
G03F7/06 |
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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