发明名称 |
PHOTOGRAPHIC SILVER HALIDE MATERIALS CONTAINING ARYL HYDRAZIDES |
摘要 |
Photographic silver halide materials containing aryl hydrazides as defined and novel aryl hydrazides with a cationic group in the acyl radical enables the preparation of photographic materials that can be developed rapidly to ultrahigh contrast at a relatively low pH value. The photographic materials are useful in reprography, particularly screening for halftone images.
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申请公布号 |
US5190847(A) |
申请公布日期 |
1993.03.02 |
申请号 |
US19910661596 |
申请日期 |
1991.02.20 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
CHAN, DOMINIC M.;RUEGER, REINHOLD |
分类号 |
C07D213/02;C07C335/20;C07D213/20;C07D213/22;C07D213/30;C07D213/38;C07D213/59;C07D213/61;C07D213/65;C07D213/73;C07D213/74;C07D213/75;C07D213/79;C07D213/82;C07D215/10;C07D217/10;C07D233/56;C07D521/00;G03C1/06 |
主分类号 |
C07D213/02 |
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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