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1.发明公开Method of preparing an aqueous solid particle dispersion of a photographically useful compound 失效一种用于制备照相用化合物的水的固体颗粒分散体的方法。
公开(公告)号：EP0569074A1
公开(公告)日：1993-11-10
申请号：EP93201135.6
申请日：1993-04-20
摘要： A method of preparing of fine, stable, homogeneous and reproducible silica particle dispersions of a photographically useful compound, to be incorporated before or during the coating procedure into at least one hydrophilic layer of a photographic material on at least one side of a support comprising the steps of dissolving a non-watersoluble but alkali-soluble compound in an aqueous alkaline solution, if necessary with the help of an organic water soluble solvent; precipitating the said compound from said solution in the presence of colloidal silica sol , preferably in the further presence of a dispersing agent by lowering the pH of the solution; removing water-soluble salts formed by the precipitation and any organic solvent used and concentrating the dispersion either during or after the precipitation by dialysis or ultrafiltration or after precipitation by flocculation and decantation, followed by washing and further decantation.
摘要翻译： 照相用化合物的细的，稳定的，均匀的和可重复的二氧化硅颗粒分散体的制备的方法，以之前或涂层过程进入上的支承件包括所述的至少一侧上的照相材料中的至少一种亲水性层中掺入 在wässrige碱性溶液中，非水溶性但碱溶性化合物溶解并根据需要用有机水溶性溶剂的帮助下的步骤; 从沉淀在胶态二氧化硅溶胶中存在所述溶液与所述的化合物中，优选在通过降低溶液的pH值的分散剂的存在下进一步; 除去沉淀和任何有机溶剂而形成的水溶性盐使用，期间或通过渗析或超滤或通过絮凝和倾析沉淀后沉淀，随后洗涤并倾析。此外后浓缩分散体。
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2.发明公开Method to spectrally sensitize tabular silver halide grains 失效Verfahren zur spektralen Sensibilisierung vontafelförmigenSilberhalogenidkörnern
公开(公告)号：EP0712034A1
公开(公告)日：1996-05-15
申请号：EP95203024.5
申请日：1995-11-08
发明人： Vandenabeele, Hubert, c/o Agfa-Gevaert N.V. , Lambrecht, Hendrik, c/o Agfa-Gevaert N.V. , Verbeeck, Ann, c/o Agfa-Gevaert N.V.
CPC分类号： G03C1/0051 , G03C1/22 , G03C5/17
摘要： A method is disclosed for manufacturing a tabular silver halide emulsion wherein the tabular silver halide grains have an aspect ratio of at least 2:1, an average crystal diameter between 0.3 µm and 3.0 µm and an average thickness of less than 0.50 µm, and more preferably less than 0.3 µm, for at least 50 % of the total projective surface area of said grains, and wherein said method comprises the steps of precipitating said grains, spectrally sensitizing and chemically ripening, characterized by adding to the emulsion before and/or during chemically ripening at least one spectrally sensitizing dye corresponding to the general formula (I)
摘要翻译： 公开了制备片状卤化银乳剂的方法，其中片状卤化银颗粒的纵横比为至少2:1，平均晶体直径在0.3μm和3.0μm之间，平均厚度小于0.50μm ，更优选小于0.3μm，对于所述颗粒的总投影表面积的至少50％，并且其中所述方法包括沉淀所述晶粒，光谱增感和化学成熟的步骤，其特征在于在所述颗粒之前加入乳液 和/或在化学成熟至少一种对应于通式（I）
的光谱增感染料时）
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