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    Grain growth process for the preparation of high bromide ultrathin tabular grain emulsions
    4.
    发明授权
    Grain growth process for the preparation of high bromide ultrathin tabular grain emulsions 失效
    用于制备乳液的与hochbromidhaltigem，超薄，片状颗粒的晶粒生长过程

    公开(公告)号：EP0701166B1

    公开(公告)日：2000-08-09

    申请号：EP95202434.7

    申请日：1995-09-07

    申请人： EASTMAN KODAK COMPANY

    发明人： Maskasky, Joe Edward, c/o Eastman Kodak Company

    IPC分类号： G03C1/07

    CPC分类号： G03C1/07 ,  G03C1/0051 ,  G03C2001/0055 ,  G03C2001/0156 ,  G03C2001/03558 ,  G03C2007/3027 ,  G03C2200/44

    摘要： A grain growth process is claimed which provides a tabular Ag halide emulsion with a Br content greater than 50 mol.%. The av. equiv. circular dia. of the grains is increased while their av. thickness is maintained at less than 0.07 mu m. The process involves: (1) preparing an aq. dispersion contg. at least 0.1 wt.% of Ag in the form of Ag halide grains with a Br content of at least 50 mol.% and an av. thickness of less than 0.06mu m; the dispersion has a pH of 1.5 to 8 and a stoichiometric excess of br to Ag ions limited to a pBr of 1.5; (2) adding a phenol with at least two iodo substits. as a grain growth modifier, the phenol being incapable of reducing the Ag halide grains provided in step (1); and (3) holding the dispersion at 40[deg] C until the av. equiv. circular dia. is at least 0.1mu m greater than that of the grains in step (1), and greater than 50% of the total grain projected area is accounted for by tabular grains with (III) major faces, an av. aspect ratio of at least 5 and an av. thickness of less than 0.07 mu m.

    Process for the preparation of a grain stabilized high chloride tabular grain photographic emulsion (I)
    8.
    发明公开
    Process for the preparation of a grain stabilized high chloride tabular grain photographic emulsion (I) 失效
    一种用于生产具有高的氯（I）的片状颗粒颗粒稳定化的感光乳剂的过程。

    公开(公告)号：EP0533189A1

    公开(公告)日：1993-03-24

    申请号：EP92115999.2

    申请日：1992-09-18

    申请人： EASTMAN KODAK COMPANY

    发明人： Maskasky, Joe Edward, c/o Eastman Kodak Company

    IPC分类号： G03C1/005

    CPC分类号： G03C1/0053 ,  G03C1/015 ,  G03C1/07 ,  G03C1/08 ,  G03C1/09 ,  G03C1/12 ,  G03C1/16 ,  G03C1/18 ,  G03C1/22 ,  G03C1/34 ,  G03C2001/0055 ,  G03C2001/03552 ,  G03C2200/03 ,  G03C2200/43

    摘要： A process is disclosed of preparing an emulsion for photographic use comprised of silver halide grains and a gelatino-peptizer dispersing medium in which morphologically unstable tabular grains having {111} major faces account for greater than 50 percent of total grain projected area and contain at least 50 mole percent chloride, based on silver. The emulsion additionally contains at least one 2-hydroaminoazine adsorbed to and morphologically stabilizing the tabular grains. Protonation releases 2-hydroaminoazine from the tabular grain surfaces into the dispersing medium. Released 2-hydroaminoazine is replaced on the tabular grain surfaces by adsorption of a photographically useful compound selected from among those that contain at least one divalent sulfur atom, thereby concurrently morphologically stabilizing the tabular grains and enhancing their photographic utility, and the released 2-hydroaminoazine is removed from the dispersing medium.

    摘要翻译： 一个进程盘游离缺失准备乳剂包含卤化银颗粒和明胶 - 胶溶剂分散介质，其中，具有{111}主面的形态不稳定的片状颗粒占总颗粒投影面积的50％以上，并含有至少的照相用途的 50摩尔％氯化物，基于银。 所述乳液还包含吸附和形态稳定片状颗粒的至少一个2-hydroaminoazines。 质子释放从片状颗粒表面2- hydroaminoazines到分散介质。 释放2- hydroaminoazines通过从thosethat中选择含有至少一个二价硫原子，由此兼形态稳定片状颗粒和提高其照相应用照相用化合物的吸附代替片状颗粒表面上，以及释放的2- hydroaminoazines 从分散介质中除去。

    Preparations of high bromide photographic emulsions with starch peptizer and oxidizing agent
    9.
    发明公开
    Preparations of high bromide photographic emulsions with starch peptizer and oxidizing agent 审中-公开
    照相乳剂的用淀粉高溴化物含量为塑解剂的制备和氧化剂

    公开(公告)号：EP1217427A2

    公开(公告)日：2002-06-26

    申请号：EP01204414.5

    申请日：2001-11-19

    申请人： EASTMAN KODAK COMPANY

    发明人： Maskasky, Joe Edward, c/o Eastman Kodak Company ,  Scaccia, Victor P., c/o Eastman Kodak Company

    IPC分类号： G03C1/005 ,  G03C1/035

    CPC分类号： G03C1/04 ,  G03C1/005 ,  G03C1/0051 ,  G03C1/08 ,  G03C2001/03511 ,  G03C2001/0478 ,  G03C2200/03 ,  G03C2200/44

    摘要： A process for precipitating a high bromide silver halide emulsion in an aqueous medium is described comprising precipitating high bromide radiation-sensitive silver halide grains in a reaction vessel in the presence of a peptizer comprising a water dispersable starch, wherein a strong oxidizing agent is added to the reaction vessel during or after the precipitation at a pH of less than 4.0 such that an oxidation potential of at least 650 mV (Ag/AgCl ref.) is achieved. A reduction in the rate of reaction between strong oxidants such as bromine and starch at such low pH has been found to enable an advantageous decrease in the amount of oxidant required to achieve and maintain a high oxidation potential during emulsion grain precipitation. Starch, unlike gelatin, also advantageously has adequate stability at the combination of high acidity and high emulsion precipitation temperatures.

    摘要翻译： 一种用于在wässrige介质中沉淀出高溴化物卤化银乳剂过程描述为包括在胶溶剂的存在下的反应容器中沉淀高溴化物辐射敏感的卤化银颗粒，其包括水可分散的淀粉，worin强氧化剂被添加到 过程中或在pH小于4.0的搜索的沉淀后的反应容器没有到氧化至少为650mV的电势（银/氯化银参考）实现。 在强氧化剂之间的反应速率的降低：如溴和淀粉在低pH的寻求已经发现，使在氧化剂来实现并保持乳化颗粒沉淀时的高氧化电势所需的量有利的减少。 淀粉，明胶不同，从而有利地具有在高酸度和高的乳液温度沉淀的组合足够的稳定性。

    Preparation of high bromide photographic emulsions with starch peptizer
    10.
    发明公开
    Preparation of high bromide photographic emulsions with starch peptizer 审中-公开
    照相Hochbromidemulsionen的制备，所用的淀粉作为胶溶剂

    公开(公告)号：EP1213608A1

    公开(公告)日：2002-06-12

    申请号：EP01204489.7

    申请日：2001-11-23

    申请人： EASTMAN KODAK COMPANY

    发明人： Maskasky, Joe Edward, c/o Eastman Kodak Company ,  Scaccia, Victor P., c/o Eastman Kodak Company

    IPC分类号： G03C1/04 ,  G03C1/005

    CPC分类号： G03C1/0051 ,  G03C1/04

    摘要： A process for precipitating a high bromide silver halide emulsion in an aqueous medium is disclosed comprising growing nucleated silver halide grains in a reaction vessel in the presence of a peptizer comprising a water dispersable starch to form high bromide radiation-sensitive silver halide grains, wherein the majority of grain growth in the reaction vessel is performed at a pH of less than 3.5. Growth of high bromide silver halide emulsion grains in the presence of a starch peptizer at low pH in accordance with the invention results in emulsion grains with lower fog, even in the absence of the use of strong oxidizing agents during grain precipitation.