发明名称 Photographic element containing an azopyrazolone masking coupler exhibiting improved keeping
摘要 This invention provides a photographic process and element where the element comprises a support bearing a light-sensitive photographic silver halide layer containing (1) a bicyclic azole coupler, (2) an azopyrazolone masking coupler, and (3) an aromatic electron-rich compound having ring substituents for which the sum of the individual Hammett sigma-para values is more negative than -0.80.
申请公布号 US5591569(A) 申请公布日期 1997.01.07
申请号 US19950539560 申请日期 1995.10.05
申请人 EASTMAN KODAK COMPANY 发明人 KAPP, DANIEL L.;YOUNATHAN, JANET
分类号 G03C7/00;G03C7/30;G03C7/333;G03C7/38;G03C7/384;G03C7/392;(IPC1-7):G03C7/333 主分类号 G03C7/00
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