利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

3 条记录 (耗时 0.01 秒)

    Epitaxially sensitized ultrathin dump iodide tabular grain emulsions
    1.
    发明授权
    Epitaxially sensitized ultrathin dump iodide tabular grain emulsions 失效

    公开(公告)号：US5641618A

    公开(公告)日：1997-06-24

    申请号：US590961

    申请日：1996-01-24

    申请人： Xin Wen ,  Richard Lee Daubendiek ,  Donald Lee Black ,  Joseph Charles Deaton ,  Timothy Richard Gersey ,  Joseph George Lighthouse ,  Myra Toffolon Olm ,  Robert Don Wilson

    发明人： Xin Wen ,  Richard Lee Daubendiek ,  Donald Lee Black ,  Joseph Charles Deaton ,  Timothy Richard Gersey ,  Joseph George Lighthouse ,  Myra Toffolon Olm ,  Robert Don Wilson

    IPC分类号： G03C1/005 ,  G03C1/12 ,  G03C1/46 ,  G03C1/035

    CPC分类号： G03C1/0051 ,  G03C1/12 ,  G03C1/46

    摘要： An improved spectrally sensitized ultrathin tabular grain emulsion is disclosed in which tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, (e) exhibiting an average thickness of less than 0.07 .mu.m, and (f) having latent image forming chemical sensitization sites on the surfaces of the tabular grains, are spectrally sensitized and improved by employing dump iodide host tabular grains and, in forming the surface chemical sensitization sites, at least one silver salt epitaxially located on the tabular grains.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.The ultrathin dump iodide tabular grain emulsions with silver salt epitaxy chemical sensitization have been observed to produce larger than expected speed increases, to produce higher than expected contrasts, to be unexpectedly specularly transmissive and therefore compatible with forming sharp photographic images in underlying emulsion layers, to exhibit a higher percentage of total light absorption in the wavelength region of maximum absorption by the spectral sensitizing dye or dyes employed, and to exhibit a surprising tolerance of inadvertent manufacturing variances.

    Nonagglomerating antifoamants
    3.
    发明授权
    Nonagglomerating antifoamants 失效
    非团聚消泡剂

    公开(公告)号：US5681692A

    公开(公告)日：1997-10-28

    申请号：US594611

    申请日：1996-02-02

    申请人： Michael William Orem ,  Richard Lee Daubendiek ,  Douglas Lee Oehlbeck ,  Joseph George Lighthouse

    发明人： Michael William Orem ,  Richard Lee Daubendiek ,  Douglas Lee Oehlbeck ,  Joseph George Lighthouse

    IPC分类号： B01D19/04 ,  G03C1/005 ,  G03C1/043 ,  G03C1/047

    CPC分类号： G03C1/043 ,  B01D19/0404 ,  G03C1/0051 ,  G03C1/047

    摘要： The invention relates to a solution for forming silver halide emulsions comprising water, a gelatin containing less than 30 micromoles of methionine per gram of gelatin, and at least one antifoamant selected from the group consisting of RCO.sub.2 (CH.sub.2 CH.sub.2 O).sub.x OCR (I) wherein RC and CR represent the carbon chain in carboxylic acids with chain lengths of predominantly 12-18 carbon atoms, x has a mean value of 4 to 5 from a mixture with a distribution of values between 2 and 7, and (H.sub.3 CSi) �(OSi (CH.sub.3).sub.2).sub.d O-- (CH.sub.2 CH.sub.2 CH.sub.2 O--).sub.n C.sub.4 H.sub.9 !.sub.3 (II) wherein the molecular weight is 2500 to 3500 and d and n have average values of less than 15.

    摘要翻译： 本发明涉及用于形成卤化银乳剂的溶液，其包含水，每克明胶中含有少于30微摩尔甲硫氨酸的明胶和至少一种选自下组的消泡剂：RCO 2（CH 2 CH 2 O）x OCR（I），其中RC和 CR表示链长度主要为12-18个碳原子的羧酸中的碳链，x从2到7之间的分布的混合物的平均值为4至5，和（H3CSi）[（OSi（CH3 ）2）dO-（CH 2 CH 2 CH 2 O-）nC 4 H 9] 3（II）其中分子量为2500〜3500，d和n的平均值小于15。