发明名称 |
Direct-positive photographic material |
摘要 |
An improvement in the stability of a direct positive emulsion layer in photographic material is obtained by the inclusion of a compound which provides in the image-wise exposed and developed direct positive emulsion layer a greater difference between the density of the image in the unexposed parts of the layer and the density in the exposed parts. The compound provides in the emulsion a characteristic curve related to a density value at maximum density which is at least twice the analogous density value at minimum density.
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申请公布号 |
US4263396(A) |
申请公布日期 |
1981.04.21 |
申请号 |
US19800111166 |
申请日期 |
1980.01.10 |
申请人 |
AGFA-GEVAERT AG |
发明人 |
KLOTZER, SIEGHART;MOISAR, ERIK;VON RINTELEN, HARALD |
分类号 |
G03C1/485;(IPC1-7):G03C5/24;G03C1/34 |
主分类号 |
G03C1/485 |
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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