High bromide ultrathin tabular grain emulsions improved by peptizer modification
    81.
    发明授权
    High bromide ultrathin tabular grain emulsions improved by peptizer modification 失效
    含有高溴化物由改性的胶溶剂提高超薄片状颗粒乳剂

    公开(公告)号:EP0758758B1

    公开(公告)日:1998-10-14

    申请号:EP96202220.8

    申请日:1996-08-07

    IPC分类号: G03C1/005 G03C1/04

    摘要: An improved spectrally sensitized ultrathin tabular grain emulsion is disclosed in which tabular grains (a) having ä111ü major faces, (b) containing greater than 50 mole percent bromide, based on silver, (c) accounting for greater than 70 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 mu m, and (e) exhibiting an average thickness of less than 0.07 mu m, show an enhanced capability for chemical sensitization by reason of employing an oxidized cationic starch as a peptizer. A photographic element is disclosed comprised of a support, a first silver halide emulsion layer coated on the support and sensitized to produce a photographic record when exposed to specular light within the minus blue visible wavelength region of from 500 to 700 nm, a second silver halide emulsion layer capable of producing a second photographic record coated over the first silver halide emulsion layer to receive specular minus blue light intended for the exposure of the first silver halide emulsion layer, the second silver halide emulsion layer being capable of acting as a transmission medium for the delivery of at least a portion of the minus blue light intended for the exposure of the first silver halide emulsion layer in the form of specular light, wherein the second silver halide emulsion layer is comprised of the improved spectrally sensitized ultrathin tabular grain emulsion of the invention.

    Silver halide photographic light sensitive material
    82.
    发明公开
    Silver halide photographic light sensitive material 失效
    卤化银照相光敏材料

    公开(公告)号:EP0768567A3

    公开(公告)日:1997-04-23

    申请号:EP96306616.2

    申请日:1996-09-12

    发明人: Suzuki, Tetsuya

    IPC分类号: G03C1/005 G03C1/04 G03C1/053

    CPC分类号: G03C1/0053 G03C1/09

    摘要: A silver halide photographic light sensitive material comprising a support and provided thereon, at least one silver halide emulsion layer comprising tabular silver halide grains having a silver chloride content of not less than 50 mol% and two parallel major {100} faces and a water soluble polymer other than gelatin, wherein chemical sensitization of the silver halide grains is carried out in the presence of said water soluble polymer.

    摘要翻译: 一种卤化银照相感光材料,它包括载体和设置在其上的至少一层卤化银乳剂层,该卤化银乳剂层包含氯化银含量不少于50摩尔%和两个平行的主{100}面的片状卤化银颗粒和水溶性 聚合物而不是明胶,其中卤化银颗粒的化学增感在所述水溶性聚合物存在下进行。

    Method of processing a silver halide light-sensitive photographic material
    87.
    发明公开
    Method of processing a silver halide light-sensitive photographic material 失效
    一个照相卤化银感光材料的处理方法。

    公开(公告)号:EP0670517A3

    公开(公告)日:1995-11-02

    申请号:EP95301129.3

    申请日:1995-02-22

    IPC分类号: G03C5/26 G03C1/95 G03C1/04

    摘要: A method for processing a silver halide photographic material. The method comprises the steps of (1) developing, fixing and washing a photographic light-sensitive material which comprises a support and a photographic layer including a silver halide emulsion layer being provided on the support in which the outermost surface of the photographic layer has a matting degree of 0 to 150 mmHg and the silver halide emulsion layer contains colloidal silica particles, (2) drying the silver halide photographic light-sensitive material by contacting with a heat conductive member having a surface temperature of 90°C to 150°C which installed in a drying zone of the automatic processing machine. In the above method, the photographic light-sensitive material has a moisture content of 3 g/m² to 6.5 g/m² at the point just before of the drying zone and the total time from start of the developing process to finish of the drying process is within the range of more than 15 seconds to less than 45 seconds.

    Preparation method of silver bromide or silver bromoiodide light-sensitive emulsions and material comprising said emulsions
    89.
    发明公开
    Preparation method of silver bromide or silver bromoiodide light-sensitive emulsions and material comprising said emulsions 失效
    为光敏感的卤化银乳剂和物质含有这样的乳液制备方法。

    公开(公告)号:EP0649051A1

    公开(公告)日:1995-04-19

    申请号:EP94202580.0

    申请日:1994-09-08

    IPC分类号: G03C1/04 G03C1/015

    摘要: A method is disclosed to prepare a light-sensitive regular silver bromide or silver bromoiodide emulsion, wherein said method comprises the following the steps:

    precipitating silver bromide or silver bromoiodide by means of the double-jet or triple-jet technique in colloidal silica having a particle size from 0.003 µm to 0.30 µm as a protective colloid in the absence of any polymeric compound(s) comprising gelatin or its derivatives capable of forming hydrogen bridges with colloidal silica, except for polythioether compounds, but always in the presence of an onium compound, except for an ammonium compound, wherein the ratio by weight of said colloidal silica to the said onium compound(s) is between 3 and 30, and, optionally, in the presence of a crystal growth modifier,
    controlling the nucleation and growth steps by means of variable flow rate(s) of the aqueous solutions of silver nitrate and halide salts and/or by means of constant pAg-values during the said steps in the vessel in order to determine the number of nuclei quantitatively in the nucleation step and to avoid renucleation in the growth step,
    desalting the reaction medium and redispersing the silver halide,
    chemically ripening the silver halide crystals and
    adjusting the ratio by weight of the colloidal silica sol to the amount of silver halide, expressed as the equivalent amount of silver nitrate to a value of at least 0.03 at every moment throughout the precipitation stage.

    摘要翻译: 一种方法,光盘游离缺失,以制备光敏定期溴化银或溴碘化银乳剂,worin所述方法包括以下步骤:在具有胶体二氧化硅沉淀溴化银或溴碘化银通过双喷或三喷射技术手段 从0.003微米的颗粒大小,以0点30微米为在不存在包含明胶或能够与胶体二氧化硅的氢桥,除了聚硫醚化合物的其衍生物的任何聚合物化合物(S)的保护性胶体,但总是在的存在 鎓化合物,除了上铵化合物,worin重量的所述胶态二氧化硅的比到所述鎓化合物(s)为3和30之间,并且,可选地,在晶体生长改性剂的存在下,控制成核和生长 期间,在容器中所述步骤的步骤由硝酸银和卤化物盐的wässrige溶液的可变流量(一个或多个)的装置和/或通过恒定的pAg值的平均值 订购确定性矿核的数量定量的成核步骤,并避免renucleation在生长步骤中,脱盐反应介质和再分散卤化银,化学熟化卤化银晶体和重量的胶态二氧化硅溶胶的调整比率向 卤化银的量,在每一个时刻在整个沉淀阶段表示为硝酸银的当量为至少0点03的值。

    Photographic element
    90.
    发明公开
    Photographic element 失效
    摄影元素

    公开(公告)号:EP0464609A3

    公开(公告)日:1992-02-05

    申请号:EP91110492.5

    申请日:1991-06-25

    IPC分类号: G03C8/54 G03C1/04

    摘要: A photographic element comprising a support having thereon at least one layer comprising a polymer obtained by copolymerizing a repeating unit represented by the following general formula (I) and a copolymerizable cellulose derivative represented by the following general formula (II):
    wherein A represents a repeating unit derived from an ethylenically unsaturated monomer having -COOH group, -SO 3 H group or -PO(OH) 2 group in the molecular structure; and B represents a repeating unit derived from a copolymerizable ethylenically unsaturated monomer;
    wherein (R 1 )s each independently represents (i) a hydrogen atom, (ii) a monovalent organic bonding group such as an ester group or an ether group or (iii) a monovalent organic bonding group represented by the following general formula (III), with the proviso that (R 1 )s do not all hydrogen atom at the same time; and n represents a number of 20 to 800;
    wherein R 2 represents hydrogen atom or an alkyl group having 1 to 6 carbon atoms; and L represents a bivalent organic bonding group, and wherein the percentage by weight of the component represented by general formula (I) in the copolymer is from 5 to 95; the percentage by weight of the component represented by general formula (III) based on the weight of the component represented by general formula (II) is from 0.00001 to 10; x and y represent each the percentage by weight of each monomer component in the copolymer and x is in the range of 1 to 95 and y is in the range of 5 to 99.