公开(公告)号：US4968596A

公开(公告)日：1990-11-06

申请号：US266605

申请日：1988-11-02

申请人： Noriyuki Inoue ,  Shigeo Hirano ,  Tetsuro Kojima ,  Mitsura Yamamoto ,  Satoshi Nagaoka

发明人： Noriyuki Inoue ,  Shigeo Hirano ,  Tetsuro Kojima ,  Mitsura Yamamoto ,  Satoshi Nagaoka

IPC分类号： G03C1/485

CPC分类号： G03C1/48546 ,  Y10S430/141

摘要： A method for forming a direct positive image comprising the steps of:(a) imagewise exposing a photographic light-sensitive material composed of a support having thereon at least one unprefogged internal latent image type silver halide light-sensitive emulsion layer; and(b) developing the exposed photographic light-sensitive material to form a direct positive image in the presence of at least one nucleating agent represented by formula (N-I); ##STR1## wherein Z.sup.1 represents nonmetal atomic group necessary for forming a 5-membered or 6-membered heterocyclic ring, a 5-membered or 6-membered heterocyclic ring fused with an aromatic ring, or a 5-membered or 6-member heterocyclic ring fused with another heterocyclic ring; R.sup.1 represents an aliphatic group; X represents ##STR2## Q represents a nonmetallic atomic group necessary for forming a 4-membered to 12-membered nonaromatic hydrocarbon ring or a 4-membered to 12-membered nonaromatic heterocyclic ring; provided that at least one of R.sup.1, Z.sup.1 and Q is substituted with an alkynyl group; Y represents a counter ion required for charge balance; and n is a number required for charge balance; or Z.sup.1 contains a heterocyclic quaternary ammonium salt completed by said Z.sup.1 via a linkage group.

摘要翻译： 一种用于形成直接正像的方法，包括以下步骤：（a）成像曝光由其上具有至少一个未反光内部潜像型卤化银感光乳剂层的支撑体组成的照相感光材料; 和（b）在存在由式（N-I）表示的至少一种成核剂的情况下，显影曝光的照相感光材料以形成直接正像; （NI）其中Z1表示形成5元或6元杂环所需的非金属原子团，与芳环稠合的5元或6元杂环，或5元或6元杂环， 与另一个杂环稠合的杂环; R1表示脂肪族基团; X表示形成4元〜12元非芳香烃环或4元〜12元非芳香族杂环所必需的非金属原子团; 条件是R1，Z1和Q中的至少一个被炔基取代; Y表示电荷平衡所需的抗衡离子; n是电荷平衡所需的数字; 或Z 1包含通过连接基团由所述Z1完成的杂环季铵盐。