公开(公告)号：US5168035A

公开(公告)日：1992-12-01

申请号：US634449

申请日：1990-12-27

申请人： Kenneth J. Lushington ,  Sucheta Tandon

发明人： Kenneth J. Lushington ,  Sucheta Tandon

IPC分类号： G03C1/015 ,  G03C1/035

CPC分类号： G03C1/015 ,  G03C2001/03523 ,  G03C2001/03547 ,  G03C2001/03582

摘要： A method for controlling pressure-induced fog in a silver bromide photographic material involves surface treatment of the emulsion AgBr grains with thiocyanate and an iodide salt. In particular, a process for making a pressure fog-resistant photographic emulsion includes steps of forming a photographic emulsion containing cubic or cubooctahedral silver bromide grains, surface-treating the AgBr grains with a thiocyanate by adding the thiocyanate to the emulsion, chemically sensitizing the emulsion, maintaining the emulsion at a temperature and for a time sufficient to allow the thiocyanate to react with the grain surfaces, and then surface-treating the AgBr grains with an iodide salt by adding the salt to the emulsion in an amount and under conditions effective to fill in cubic faces of the AgBr grains. The latter step partially or fully converts the AgBr grains to octahedral grains. A photographic element can then be made by coating the emulsion on a suitable base.

摘要翻译： 在溴化银照相材料中控制压力引起的雾的方法包括用硫氰酸盐和碘化物盐对乳液AgBr颗粒进行表面处理。 特别地，制造耐压雾照相乳剂的方法包括形成含有立方或立方八面体溴化银颗粒的照相乳剂的步骤，用硫氰酸盐将硫氰酸盐加入到乳液中，对乳液进行表面处理，使乳液化学增感 将乳液保持在足以允许硫氰酸盐与颗粒表面反应的温度和时间，然后用碘盐将表面处理AgBr颗粒，通过向该乳液中加入一定量和在有效 填充AgBr颗粒的立方面。 后一步骤部分或全部将AgBr晶粒转化为八面体晶粒。 然后可以通过将乳液涂覆在合适的基底上来制备照相元件。

公开(公告)号：US06245497B1

公开(公告)日：2001-06-12

申请号：US09467200

申请日：1999-12-20

申请人： Jon N. Eikenberry ,  David T. Southby

发明人： Jon N. Eikenberry ,  David T. Southby

IPC分类号： G03C108

CPC分类号： G03C1/10 ,  G03C1/035 ,  G03C1/12 ,  G03C7/3003 ,  G03C7/3022 ,  G03C7/30547 ,  G03C7/39208 ,  G03C2001/0055 ,  G03C2001/03541 ,  G03C2001/03547 ,  G03C2001/03558 ,  G03C2001/03594 ,  G03C2007/325 ,  G03C2200/11 ,  G03C2200/24 ,  Y10S430/156

摘要： A photographic element comprises a support bearing a cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one of said emulsion layers comprises a) an emulsion with 3D, core/shell grains of at least 0.40 &mgr;m average diameter having a high iodide content in the core of the grain with a shell containing a lesser amount of iodide, b) a one-equivalent image-dye forming coupler, and c) a fragmentable electron donating compound of the formula: X—Y′ or a compound which contains a moiety of the formula —X—Y′; wherein X is an electron donor moiety, Y′ is a leaving proton H or a leaving group Y, with the proviso that if Y′ is a proton, a base, &bgr;−, is covalently linked directly or indirectly to X, and wherein: 1) X—Y′ has an oxidation potential between 0 and about 1.4 V; and 2) the oxidized form of X—Y′ undergoes a bond cleavage reaction to give the radical X• and the leaving fragment Y′; and, optionally, 3) the radical X• has an oxidation potential ≦−0.7V (that is, equal to or more negative than about −0.7V).

摘要翻译： 照相元件包括支持青色染料成像单元的载体，该单元包含至少一种与其相关联的至少一种青色染料形成成色剂的红色感光卤化银乳剂层，品红色染料影像形成单元包括至少一种绿色染料成像单元， 具有与其相关的至少一种品红色染料形成成色剂的黄色染料影像形成单元，其包含至少一种感蓝卤化银乳剂层，所述蓝色感光卤化银乳剂层具有至少一种形成黄色染料的成色剂，其中至少 所述乳剂层之一包括：具有三维，具有至少0.40μm平均直径的芯/壳颗粒的乳液，其在颗粒核中具有高碘含量，其中壳含有较少量的碘化物，b）1当量 图像染料形成成色剂，和c）下式的可裂解供电子化合物：XY'或含有式-X-Y'部分的化合物;其中X是电子给体m Y'是离开质子H或离去基团Y，条件是如果Y'是质子，则基团β - 与X直接或间接地共价连接，并且其中：1）XY'具有 0〜1.4V之间的氧化电位; 和2）X-Y'的氧化形式发生键断裂反应，得到X基团和离去片段Y'; 和任选地，3）基团X的氧化电位<= -0.7V（即等于或大于约-0.7V的负值）。

公开(公告)号：US5298384A

公开(公告)日：1994-03-29

申请号：US955345

申请日：1992-10-01

申请人： Kenneth J. Lushington ,  Sucheta Tandon

发明人： Kenneth J. Lushington ,  Sucheta Tandon

IPC分类号： G03C1/015 ,  G03C1/035

CPC分类号： G03C1/015 ,  G03C2001/03523 ,  G03C2001/03547 ,  G03C2001/03582

摘要： A method for controlling pressure-induced fog in a silver bromide photographic material involves surface treatment of the emulsion AgBr grains with thiocyanate and an iodide salt. In particular, a process for making a pressure fog-resistant photographic emulsion includes steps of forming a photographic emulsion containing cubic or cubooctahedral silver bromide grains, surface-treating the AgBr grains with a thiocyanate by adding the thiocyanate to the emulsion, chemically sensitizing the emulsion, maintaining the emulsion at a temperature and for a time sufficient to allow the thiocyanate to react with the grain surfaces, and then surface-treating the AgBr grains with an iodide salt by adding the salt to the emulsion in an amount and under conditions effective to fill in cubic faces of the AgBr grains. The latter step partially or fully converts the AgBr grains to octahedral grains. A photographic element can then be made by coating the emulsion on a suitable base.

摘要翻译： 在溴化银照相材料中控制压力引起的雾的方法包括用硫氰酸盐和碘化物盐对乳液AgBr颗粒进行表面处理。 特别地，制造耐压雾照相乳剂的方法包括形成含有立方或立方八面体溴化银颗粒的照相乳剂的步骤，用硫氰酸盐将硫氰酸盐加入到乳液中，对乳液进行表面处理，使乳液化学增感 将乳液保持在足以允许硫氰酸盐与颗粒表面反应的温度和时间，然后用碘盐将表面处理AgBr颗粒，通过向该乳液中加入一定量和在有效 填充AgBr颗粒的立方面。 后一步骤部分或全部将AgBr晶粒转化为八面体晶粒。 然后可以通过将乳液涂覆在合适的基底上来制备照相元件。