Gradation-variable black-and-white paper
    1.
    发明授权
    Gradation-variable black-and-white paper 失效
    可分级黑白纸

    公开(公告)号:US5006455A

    公开(公告)日:1991-04-09

    申请号:US269993

    申请日:1988-11-10

    摘要: A gradation-variable BW paper comprising only one silver halide emulsion layer, in which re-sensitization is avoided, is obtained with a mixture of at least two photosensitive silver halide emulsions, of which one has its absorption maximum in the range from 480 to 580 while the other has its absorption maximum below 480 nm, providing the emulsion which has its absorption maximum below 480 nm contains a compound corresponding to the following formula ##STR1## in which X represents the remaining members of an optionally benzo- or naphtho-condensed heterocycle optionally containing further substituents.

    摘要翻译: 使用至少两种感光卤化银乳剂的混合物获得仅包含一种卤化银乳剂层的等级变化的BW纸,其中避免了再敏化,其中一种吸收最大值在480-580 而另一个的吸收最大值低于480nm,提供其吸收最大值低于480nm的乳液含有对应于下式的化合物:其中X表示任选的苯并或萘并稠合的杂环的剩余成员 任选地含有其它取代基。

    Gradation variable black- and -white paper
    2.
    发明授权
    Gradation variable black- and -white paper 失效
    等级变黑和白纸

    公开(公告)号:US4987063A

    公开(公告)日:1991-01-22

    申请号:US269564

    申请日:1988-11-10

    IPC分类号: G03C1/035 G03C1/18

    CPC分类号: G03C1/18 G03C1/035

    摘要: A gradation variable black-and-white paper containing only one light sensitive silver halide emulsion layer in which transfer of sensitization is prevented may be obtained by sensitization with at least one compound corresponding to the following formula ##STR1## in which at least one of the groups R.sub.1, R.sub.5 or R.sub.6 is halogen.

    摘要翻译: 仅通过使至少一种对应于下列化学式的化合物进行致敏即可获得仅含有一种感光性卤化银乳剂层的渐变可变黑白纸,其中, R 1,R 5或R 6中的至少一个是卤素。

    Photographic recording material
    4.
    发明授权
    Photographic recording material 失效
    摄影记录材料

    公开(公告)号:US4810627A

    公开(公告)日:1989-03-07

    申请号:US169971

    申请日:1988-03-18

    摘要: Compounds corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.2 denote alkyl groups with 1 to 8 carbon atoms, an optionally substituted alkenyl group with 2 to 5 carbon atoms, an optionally substituted cycloalkyl group with 5 or 6 carbon atoms or an optionally substituted aryl group or R.sub.1 and R.sub.2 together represent the ring members required to form a 5- or 6-membered cycloalkyl or cycloalkenyl group, are suitable for use as antifoggants in photographic recording materials.

    摘要翻译: 对应于下式的化合物:其中R 1和R 2表示具有1至8个碳原子的烷基,任选取代的具有2至5个碳原子的烯基,任选取代的具有5或6个碳原子的环烷基或任选取代的 芳基或R 1和R 2一起表示形成5-或6-元环烷基或环烯基所需的环成员,适合用作照相记录材料中的防灰雾剂。

    Photographic silver halide emulsion
    7.
    发明授权
    Photographic silver halide emulsion 失效
    摄影银膜乳液

    公开(公告)号:US5229264A

    公开(公告)日:1993-07-20

    申请号:US887323

    申请日:1992-05-22

    CPC分类号: G03C1/09

    摘要: A quick-developing highly sensitive silver halide emulsion distinguished by steep gradation, a minimal increase in fog during storage, improved threshold gradation and low sensitivity to below-threshold pre-exposure is obtained by the addition of a diindoyl disulfide during preparation of the emulsion.

    摘要翻译: 通过在乳液制备过程中加入二苯二甲酰二硫化物可获得快速发展的高灵敏度卤化银乳剂,其特征在于陡峭的分级,储存期间雾的最小增加,阈值梯度的提高以及低于阈值预曝光的低灵敏度。