发明名称 |
Direct-positive silver halide emulsions having incorporated developers |
摘要 |
Direct-positive emulsions are described comprising incorporated developing agents wherein the developing agents are 1,4-dihydroxybenzene compounds of which at least one of the hydroxyl groups has been esterified to form a hydrolyzable aliphatic acyloxy group comprising a quaternary ammonium group.
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申请公布号 |
US4026708(A) |
申请公布日期 |
1977.05.31 |
申请号 |
US19750552036 |
申请日期 |
1975.02.21 |
申请人 |
AGFA-GEVAERT, N.V. |
发明人 |
VANASSCHE, WILLY JOSEPH;POLLET, ROBERT JOSEPH;WILLEMS, JOZEF FRANS;VANDENBERGHE, ANTOON LEON;BERENDSEN, JULES ROBERT;PATTYN, HERMAN ALBERIK |
分类号 |
C07D213/04;C07D213/20;G03C1/485;(IPC1-7):G03C1/06;G03C5/24 |
主分类号 |
C07D213/04 |
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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