发明名称 |
Direct-positive photographic element and method for producing a direct-positive silver halide emulsion. |
摘要 |
<p>A direct positive emulsion is produced by nonuniform fogging. The latter is conducted by varying the addition of the emulsion to fogging agent or by variable quenching of the fogging reaction. Films using such emulsion have extended exposure latitude or long scale, and the density vs. Log Exposure curve is smooth and continuous.</p> |
申请公布号 |
EP0047975(A1) |
申请公布日期 |
1982.03.24 |
申请号 |
EP19810107096 |
申请日期 |
1981.09.09 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
BYER, RICHARD JOEL |
分类号 |
G03C1/005;G03C1/485;(IPC1-7):03C1/485 |
主分类号 |
G03C1/005 |
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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