发明名称 DIRECT POSITIVE TYPE SILVER HALIDE PHOTOGRAPHIC SENSITIVE MATERIAL AND PROCESSING METHOD THEREFOR
摘要 PURPOSE:To obtain a high quality photographic image having sufficiently high max. density and sufficiently low min. density by regulating silver halide particles in a silver halide emulsion contg. a specified magenta coupler. CONSTITUTION:A green sensitive layer is formed with a silver halide emulsion contg. silver halide particles whose particle size distribution curve has at least two peaks. The pref. particle size at the lowest peak is <=0.30mum and that at other peak is <=1.5mum. The silver halide emulsion also contains a magenta coupler represented by formula I, wherein Z is a group of nonmetallic atoms required to form a hetero ring contg. N, X is H or a group which can be released by a reaction with the oxidized product of a color developing agent and R is H or a substituent. Wide gradation and satisfactory tone reproduction are attained.
申请公布号 JPH01221739(A) 申请公布日期 1989.09.05
申请号 JP19880047179 申请日期 1988.02.29
申请人 KONICA CORP 发明人 TOSAKA YASUO;KURAMOTO KAZUYA;NONAKA YOSHIYUKI
分类号 G03C1/485;G03C7/30;G03C7/38 主分类号 G03C1/485
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