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8 条记录 (耗时 0.019 秒)

    Ageing improvements of photographic elements comprising dextran
    5.
    发明授权
    Ageing improvements of photographic elements comprising dextran 失效
    包含葡聚糖的摄影元件的老化改善

    公开(公告)号：US5609986A

    公开(公告)日：1997-03-11

    申请号：US638068

    申请日：1996-04-25

    申请人： Rino Feduzi ,  Cristina Soncini ,  Antonella Celada ,  Salvatore Selvaggio ,  Ivo Zullo

    发明人： Rino Feduzi ,  Cristina Soncini ,  Antonella Celada ,  Salvatore Selvaggio ,  Ivo Zullo

    IPC分类号： G03C1/04 ,  G03C1/06 ,  G03C1/295 ,  G03C1/76

    CPC分类号： G03C1/04 ,  G03C1/061

    摘要： The present invention relates to a process for improving the ageing properties of a silver halide photographic element, free of photolytically generated latent images, comprising a support bearing at least one light-sensitive silver halide emulsion layer and at least one light-insensitive layer, the silver halide light-sensitive emulsion layer including negative acting surface latent image-type silver halide grain in association with a contrast promoting agent and a hydrazine compound, by adding a total amount of at least 0.40 grams per square meter of dextran to at least said light-sensitive silver halide emulsion layer and/or to at least said light-insensitive layer.

    摘要翻译： 本发明涉及一种改善不含光解产生的潜像的卤化银照相元件的老化性能的方法，其包括至少一个感光卤化银乳剂层和至少一个不透光层的载体， 通过将至少0.40克/平方米的葡聚糖的总量与对比促进剂和肼化合物相结合，将至少含有所述光的至少所述光的卤化银感光乳剂层包括负性表面潜像型卤化银颗粒 感光卤化银乳剂层和/或至少所述不透光层。

    Cyan chromogenic leuco dyes for photothermographic materials
    6.
    发明授权
    Cyan chromogenic leuco dyes for photothermographic materials 失效
    用于光热照相材料的青色发色无色染料

    公开(公告)号：US5330864A

    公开(公告)日：1994-07-19

    申请号：US939093

    申请日：1992-09-02

    申请人： Raffaella Biavasco ,  Cristina Soncini

    发明人： Raffaella Biavasco ,  Cristina Soncini

    IPC分类号： G03C1/498

    CPC分类号： G03C1/49854

    摘要： Phothermographic material capable of producing a high density cyan image upon image-wise exposure and thermal development at a relatively low temperature and for a short period of time. The photothermographic material of the invention comprise coated on a support base at least one light-sensitive emulsion layer containing: (a) a binder; (b) a silver source material; (c) a light sensitive silver halide in catalytic proximity to said silver source material, wherein said emulsion layer or an adjacent layer thereto comprises a chromogenic cyan leuco dye.The photothermographic material of the invention may be used to obtain good cyan image of suitable density in single color or multicolor photothermographic articles. At the same time the chromogenic leuco dye is stable enough not to be oxidized by oxygen of the air or by simple heating and to limit the fog formation after development.

    摘要翻译： 能够在相对低的温度和短时间内在成像曝光和热显影时产生高密度青色图像的热成像材料。 本发明的光热敏成像材料包括在支撑基底上涂覆至少一种感光乳剂层，其包含：（a）粘合剂; （b）银源材料; （c）催化接近所述银源材料的感光卤化银，其中所述乳剂层或其相邻层包含显色青色无色染料。 本发明的光热敏成像材料可以用于在单色或多色光热敏成像制品中获得合适密度的良好的青色图像。 同时，显色无色染料足够稳定，不会被空气的氧气或简单的加热氧化，并且限制了显影后的雾形成。

    Chromogenic leuco redox-dye-releasing compounds for photothermographic elements
    7.
    发明授权
    Chromogenic leuco redox-dye-releasing compounds for photothermographic elements 失效
    用于光热敏成像元件的显色无色氧化还原 - 染料释放化合物

    公开(公告)号：US5492804A

    公开(公告)日：1996-02-20

    申请号：US269400

    申请日：1994-06-30

    申请人： Raffaella Biavasco ,  Lori S. Harring ,  Larry R. Krepski ,  Daniel E. Mickus ,  Mark B. Mizen ,  Sharon M. Simpson ,  Cristina Soncini ,  Kim M. Vogel

    发明人： Raffaella Biavasco ,  Lori S. Harring ,  Larry R. Krepski ,  Daniel E. Mickus ,  Mark B. Mizen ,  Sharon M. Simpson ,  Cristina Soncini ,  Kim M. Vogel

    IPC分类号： G03C8/40 ,  C07C275/40 ,  C07C275/42 ,  C07C311/46 ,  G03C1/498

    CPC分类号： C07C275/40 ,  C07C275/42 ,  C07C311/46 ,  G03C1/49854 ,  Y10S430/156

    摘要： A photothermographic element comprising a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising:(a) a photosensitive silver halide;(b) a non-photosensitive, reducible source of silver;(c) a chromogenic leuco dye reducing agent; and(d) a binder;wherein the chromogenic leuco dye reducing agent is a chromogenic leuco redox-dye-releasing compound of the general formula: ##STR1## wherein: (i) Cp is a coupler group;(ii) N--D is a photographic developer group; and(iii) R.sup.1 is a --C(O)--NH--A--Dye group wherein Dye represents the chromophore of a thermally mobile dye; and A represents a single bond or a divalent linking group of the formula --X--R.sup.5 --L--, wherein R.sup.5 is a divalent hydrocarbon chain containing up to 12 carbon atoms, L is a single bond or a divalent group that binds the chromophore of the thermally mobile dye to R.sup.5, and X represents a single bond or an --SO.sub.2 -- group.

    摘要翻译： 一种光热敏成像元件，包括承载至少一个可热显影的，感光的成像光热敏成像乳剂层的支撑体，其包含：（a）感光卤化银; （b）非光敏，可还原的银源; （c）显色无色染料还原剂; 和（d）粘合剂; 其中所述显色无色染料还原剂是通式为：其中：（i）Cp为偶合剂基团的显色无色隐绿色氧化还原 - 染料释放化合物。 （ii）N-D是照相显影剂组; 和（iii）R 1是-C（O）-NH-A-染料基团，其中染料代表热移动染料的发色团; 并且A表示单键或式-X-R5-L-的二价连接基团，其中R 5是含有至多12个碳原子的二价烃链，L是单键或二价基团，其结合 热移动染料至R5，X表示单键或-SO 2 - 基团。