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    • 1. 发明授权
    • Direct positive silver halide emulsion and color diffusion transfer
light-sensitive material therewith
    • US5420004A
    • 1995-05-30
    • US103705
    • 1993-08-10
    • Munehisa FujitaToru Sano
    • Munehisa FujitaToru Sano
    • G03C1/015G03C1/053G03C1/08G03C1/485G03C8/06G03C8/08G03C8/10
    • G03C1/48538G03C1/48576G03C8/08
    • An internal latent image type positive silver halide emulsion has improved sensitivity reduction in low illuminance exposures. A color diffusion transfer light-sensitive material incorporates the emulsion and has reduced sensitivity reduction. The internal latent image type positive silver halide emulsion is prepared using a polymer having a repetitive unit derived from an ethylenically unsaturated monomer having at least one thioether structure on a side chain as a deflocculating agent to form silver halide grains and subjecting the grain surfaces to a chemical sensitization in the presence of a polymer having a repetitive unit represented by the following Formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituted or unsubstituted alkyl group and Q represents a group selected from the group consisting of groups represented by the following Formula (1) to Formula (4): ##STR2## wherein q represents an integer of 2 to 4; ##STR3## wherein R.sup.2 and R.sup.3 each independently represents a hydrogen atom or a substituted or unsubstituted alkyl group; ##STR4## wherein Z.sup.1 represents a group of atoms necessary to form a substituted or unsubstituted lactam ring, a substituted or unsubstituted oxazolidone ring, or a substituted or unsubstituted pyridone ring; and A represents a single bond, a --C(.dbd.O)-- group, or a group represented by the following Formula (3a): ##STR5## wherein B represents an --O-- group or an --N(R.sup.4)-- group, in which R.sup.4 represents a hydrogen atom or a substituted or unsubstituted alkyl group; and k represents an integer of 1 to 6; ##STR6## wherein A has the same meaning as A in the above Formula (3); D represents a single bond, an --O-- group or an --N(R.sup.5)-- group; m and n each represents an integer of 1 to 6, which satisfy the relationship of m+n.dbd.4 to 7, in which R.sup.5 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a group represented by the following Formula (4a): ##STR7## wherein R.sup.6 represents a substituted or unsubstituted alkyl group.
    • 10. 发明授权
    • Method for producing silver halide emulsion
    • 卤化银乳剂的制备方法
    • US5756277A
    • 1998-05-26
    • US580188
    • 1995-12-28
    • Toru Sano
    • Toru Sano
    • G03C1/015G03C1/005G03C1/035G03C1/07
    • G03C1/0053G03C1/07
    • A method for producing a silver halide emulsion comprising high silver chloride tabular grains each having a chloride content of 50 mol % or more and having a major plane comprising a (111) face, which comprises a step for conducting nucleation of said grains substantially in the absence of a crystal phase controlling agent to form grains which have two twin planes parallel with each other and of which most of the surface are (100) faces, a step for ripening said grains by adding a crystal phase controlling agent which adsorbs to the (111) face or a mixture of a crystal phase controlling agent which adsorbs to the (111) face and a protective colloid to reduce the ratio of grains other than the grains having two or more parallel twin planes and then a step for growing with remaining tabular grains having a major plane mainly comprising a (111) face to form tabular grains having a major plane comprising a (111) face.
    • 一种卤化银乳剂的制造方法,其包含高氯化银片状颗粒,其各自具有50摩尔%以上的氯含量,并且具有包括(111)面的主面,其包括基本上在 不存在结晶相控制剂以形成具有彼此平行的两个平面并且其中大部分表面为(100)面的晶粒的晶粒;通过添加吸附至(100)表面的晶体相控制剂来成熟所述晶粒的步骤, 111)面或吸附到(111)面的结晶相控制剂和保护胶体的混合物,以降低具有两个或更多个平行双面的颗粒之外的晶粒的比例,然后是用剩余的片状生长的步骤 具有主要包括(111)面的主平面的颗粒形成具有包括(111)面的主平面的片状颗粒。