摘要:
The invention is a process of producing a lithographic silver halide emulsion having a core/shell structure exhibiting improved halftone dot quality and increased photographic speed, comprising: (1) precipitating a silver chloride emulsion in a protective colloid, (2) converting said silver chloride emulsion to a silver bromide emulsion, and (3) precipitating a silver chloride shell on the surfaces of the silver bromide grains.
摘要:
A photothermographic recording material comprising a support and a photo-addressable thermally developable element, the photo-addressable thermally developable element containing a mixture of a substantially light-insensitive silver salt of a monocarboxylic acid and a substantially light-insensitive compound exclusive of silver succinate represented by formula (I): AgOOC—R1—COOAg wherein R1 is a straight chain saturated or unsaturated hydrocarbon group with two or three carbon atoms, optionally substituted with one or more of ═O, ═S, ═CR2R3, an alkyl group, an aryl group, an amino group, a substituted amino group, a cycloalkyl group, a hydroxy group, a thiol group, an alkyl sulphone group, an aryl sulphone group, an alkoxy group, an acyloxy group, a thioalkyl group, a thioaryl, a carbamic ester group, a halogen atom or a —(C═O)R4 group; wherein if R1 is substituted with two substituents selected from the group consisting of alkyl, thioalkyl, substituted amino and alkoxy groups the two substituents may jointly comprise the atoms necessary to complete a carbocyclic or heterocyclic ring; R2 and R3 are independently hydrogen or an alkyl, substituted alkyl, hydroxy or thiol; R4 is a hydroxy, —OAg, alkoxy, alkyl or —NHR6 group; R6 is hydrogen or an alkyl group; an organic reducing agent for the mixture of substantially light-insensitive organic silver salts in thermal working relationship therewith, a photosensitive silver halide in catalytic association with said mixture of substantially light-insensitive organic silver salts, and a binder; a photothermographic recording process therewith.
摘要翻译:一种光热记录材料,其包括支持体和可光寻址的热显影元件,所述光寻址热可显影元件含有单羧酸的基本上不受光敏感的银盐和不含琥珀酸银的基本上不光敏感的化合物的混合物 式(I):其中R 1是具有两个或三个碳原子的直链饱和或不饱和烃基,任选被一个或多个= O,= S,= CR 2 R 3取代, 烷基,芳基,氨基,取代氨基,环烷基,羟基,硫醇基,烷基砜基,芳基砜基,烷氧基,酰氧基,硫代烷基 ,硫代芳基,氨基甲酸酯基,卤素原子或 - (C = O)R 4基团; 其中如果R 1被两个选自烷基,硫代烷基,取代的氨基和烷氧基的取代基取代,则两个取代基可以共同包含完成碳环或杂环所必需的原子; R 2和R 3独立地是氢或烷基,取代的烷基,羟基或硫醇; R 4是羟基,-OAg,烷氧基,烷基或-NHR 6基团; R 6是氢或烷基; 用于与热处理关系的基本上不光敏的有机银盐的混合物的有机还原剂,与所述基本上不透光的有机银盐的混合物催化缔合的光敏卤化银和粘合剂; 光电照相记录方法。
摘要:
In a light-sensitive material for tanning development containing unhardened or only slightly hardened gelatin silver halide emulsion layers, the silver content required to obtain maximum density is reduced by incorporating carbon black pretreated with water-miscible compounds which have a higher affinity for carbon black than gelatin. Suitable treatment may be provided by at least two of the following: poly-n-vinyl lactams, polyalkylene oxide derivatives, water-miscible compounds containing at least two OH groups, and polyalkylene oxides with a molecular weight of at least 400.