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    Process for the production of silver halide dispersions
    3.
    发明授权
    Process for the production of silver halide dispersions 失效
    生产银盐分散体的方法

    公开(公告)号：US3790386A

    公开(公告)日：1974-02-05

    申请号：US3790386D

    申请日：1971-11-19

    Applicant: AGFA GEVAERT AG

    Inventor： POSSE R ,  SALECK W ,  MULLER H ,  RANDOLPH A ,  MOLL F

    IPC: G03C1/015 ,  G03C1/02

    CPC classification number: G03C1/015 ,  G03C2200/09

    Abstract: The preparation of a photo-sensitive salt dispersion having salts of sparing solubility in water which results in a material having a characteristic curve of the flatter gradient type by precipitating a sparingly soluble salt in a small first volume chamber which permits the reactants to be maintained with constant uniformity through the first chamber by stirring. Conducting the resultant dispersion through a conduit to a separated ripening chamber of a second volume many times that of the precipitating first volume. The silver halide emulsion is partially recycled from the separated ripening chamber through a conduit to the precipitation reaction which is outside of the second volume and where the recycled emulsion serves as reaction medium for the further precipitation of further silver halide salts. The amount of recycled silver halide emulsion is variable to provide an influence on the flatness of the gradient of the characteristic curve of the final emulsion.

    Abstract translation: 制备具有在水中具有节省溶解度的盐的光敏盐分散体，其导致具有较平坦梯度型特征曲线的材料，通过在小的第一容积室中沉淀可溶性盐，该小容量室允许反应物保持在 通过搅拌通过第一室恒定均匀。 将所得到的分散体通过导管输送到第二体积的分离的成熟室，其是沉淀的第一体积的多倍。 卤化银乳剂通过导管从分离的熟化室部分再循环到位于第二体积外的沉淀反应，再循环的乳液用作进一步沉淀其它卤化银盐的反应介质。

    Light-sensitive photographic material with increased sensitivity to light
    6.
    发明授权
    Light-sensitive photographic material with increased sensitivity to light 失效
    具有增加光敏感度的感光摄影材料

    公开(公告)号：US3846135A

    公开(公告)日：1974-11-05

    申请号：US13061771

    申请日：1971-04-02

    Applicant: AGFA GEVAERT AG

    Inventor： HELLMIG E ,  SALECK W ,  MOLL F ,  RANDOLPH A

    IPC: G03C1/46 ,  G03C1/02 ,  G03C1/08

    CPC classification number: G03C1/46

    Abstract: 1. A LIGHT SENSITIVE PHOTOGRAPHIC MATERIAL OF IMPROVED SPEED AND GRANURALITY ESSENTIALLY CONSISTING OF A SUPPORT AND IN SUPERPOSED RELATIONSHIP A FIRST SILVER HALIDE EMULSION OF SILVER BROMIDE OR SILVER BROMO-IODIDE CLOSER TO THE SUPPORT AND A SECOND SILVER HALIDE EMULSION OF SILVER BROMIDE OR SILVER BROMO-IODIDE SUPERPOSED OVER THE FIRST EMULSION WHEREIN THE IMPROVEMENT COMPRISES THE SECOND EMULSION IS IN A LAYER HAVING A THICKNESS OF AT LAST 2$ AND THE FIRST EMULSION IS IN A LAYER HAVING A THICKNESS OF BETWEEN 5 AND 15U AND IS GREATER IN THICKNESS, THE FIRST EMULSION HAS A SENSITIVITY ABOUT 0.1 TO 0.4 LOG 1.T UNITS LESS THAN THE SENSITIVITY OF THE SECOND EMULSION AS MEASURED BY THE POINTS ON THE CHARACTERISTIC CURVES WHICH

    ARE ABOVE THE EXPOSURE REQUIRED TO PRODUCE VISIBLE DENSITY, AND WHICH IMPROVEMENT RESULTS IN THE FIRST EMULSION GIVING A DENSITY OF AT LEAST 1.5, THE SECOND EMULSION GIVIMG A DENSITY OF NOT OVER 0.9 AND THE SLOWER EMULSION HAVING THE THRESHOLD OF ITS CHARACTERISTIC CURVE COINCIDING IN LOG 1.T UNITS WITH THE SHOULDER OF THE CHARACTERISTIC CURVE OF THE FASTER EMULSION AND WHEREBY OVERALL SENSITIVITY IN LOG 1.T UNITS OF SAID LIGHT SENSITIVE MATERIAL IS GREATER THEN THE SENSITIVITY OF THE MORE SENSITIVE SECOND EMULSION MEASURED BY THE POINTS ON THE CHARATERISTIC CURVE ABOVE THE EXPOSURE REQUIRED TO PRODUCE VISHIBLE DENSITY.

    Silver halide emulsions for the production of reversal colorphotographic images
    8.
    发明授权
    Silver halide emulsions for the production of reversal colorphotographic images 失效
    用于生产反向彩色图像的银粉乳液

    公开(公告)号：US3779764A

    公开(公告)日：1973-12-18

    申请号：US3779764D

    申请日：1971-11-10

    Applicant: AGFA GEVAERT AG

    Inventor： MOLL F ,  MORCHER B ,  RECKZIEGEL E ,  SALECK W

    IPC: G03C1/46 ,  G03C7/30 ,  G03C5/50

    CPC classification number: G03C7/3022 ,  G03C1/46

    Abstract: A silver halide emulsion mixture for the preparation of colorphotographic reversal images by the imagewise exposure and color development of red- green- and blue sensitive emulsion layers in at least one of which the emulsion is a mixture of a relatively highly sensitive silver halide and a relatively less sensitive silver halide emulsion wherein the less sensitive silver halide emulsion has an average grain size at least 50 percent of the average grain size of the more highly sensitive emulsion.

    Abstract translation: 一种卤化银乳剂混合物，用于通过成像曝光和红 - 蓝和蓝敏感乳剂层的显色制备彩色照相反转图像，其中至少一种乳液是相对高灵敏度的卤化银和相对较高灵敏度的卤化银的混合物 不太敏感的卤化银乳剂，其中较不敏感的卤化银乳剂的平均粒径为更高灵敏度乳剂的平均粒径的至少50％。

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