发明名称 |
Direct positive silver halide emulsion |
摘要 |
A high-contrast direct positive prefogged silver halide emulsion free from coror stain, which contains at least one new dimethinecyanine dye wherein the 3-position of a pyrazolo[1,5-a]pyridine nucleus is bonded through a dimethine chain to the 1-, 2-, 3- or 4-position of a cyanine hetero ring nucleus, provided that where the bonding is in the 4-position said cyanine nucleus is a quinoline nucleus or a pyridine nucleus and where the bonding is in the 1- or 3-position said cyanine nucleus is an isoquinoline nucleus, said dimethyinecyanine dye being present in an amount sufficient to sensitize said emulsion.
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申请公布号 |
US4259439(A) |
申请公布日期 |
1981.03.31 |
申请号 |
US19780952214 |
申请日期 |
1978.10.17 |
申请人 |
MITSUBISHI PAPER MILLS, LTD. |
发明人 |
TANAKA, AKIRA;YOSHIDA, AKIO;HAINO, KOZO |
分类号 |
G03C1/485;(IPC1-7):G03C1/08;G03C1/36 |
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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