发明授权
US4801520A Direct positive color light-sensitive material comprising a DIR coupler and a pyrazoloazole coupler, and a process for forming a direct positive image 失效
包含DIR成色剂和吡唑并唑成色剂的直接正色感光材料以及形成直接正像的方法

Direct positive color light-sensitive material comprising a DIR coupler
and a pyrazoloazole coupler, and a process for forming a direct
positive image
摘要:
A direct positive color light-sensitive material comprising a support having provided thereon at least one photographic emulsion layer containing unfogged internal latent image type silver halide particles and a color image forming coupler, wherein said color image forming coupler itself is substantially nondiffusible and produces or releases a dye upon oxidation coupling with a color developing agent, and said light-sensitive material contains at least one development inhibitor-releasing type coupler selected from the group consisting of compounds represented by formulae (D-I) and (D-II)Coup--Z (D-I)Coup--TIME--Z (D-II)wherein Coup represents a coupler residual group; Z represents a diffusible development inhibitor or a precursor thereof; and TIME represents a timing group.
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