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    • 10. 发明授权
    • Heat erasable photographic element and process comprising silver halide
    • 热可擦除照相元件和包含卤化银的方法
    • US4433037A
    • 1984-02-21
    • US398483
    • 1982-07-15
    • Thap DoMinh
    • Thap DoMinh
    • B41M5/26G03C1/035G03C1/06G03C1/42G03C5/26G03C11/00G03C1/00G03C5/16
    • G03C1/06G03C1/42G03C5/262Y10S430/137
    • A heat erasable photographic material comprises, in reactive association, in a suitable binder:(a) photographic silver halide;(b) a mild oxidizing agent which consists essentially of a cobalt(III) amine salt which, upon heating of the photographic material, will oxidize any latent image silver present in the photographic material; and(c) a weak complexing agent for the oxidized silver.Any latent image silver in the photographic material is erased upon brief uniform heating of the photographic material. The photographic material is light handleable prior to uniform heating. After uniform heating, the photographic material is capable of being imagewise exposed and processed to produce a developed silver image. The photographic material may comprise a selected silver halide developing agent. A developed image is produced in a heat erasable photographic material by (1) first uniformly heating the material at a temperature and for a time sufficient to erase any latent image silver in the photographic material, then (2) exposing the material to light to produce a developable image and (3) thereafter developing an image. The photographic material is preferably a photothermographic material.
    • 热可消除的照相材料在反应性缔合下包含合适的粘合剂:(a)照相卤化银; (b)温和的氧化剂,其主要由钴(III)胺盐组成,其在照相材料的加热时将氧化存在于照相材料中的任何潜像银; 和(c)氧化银的弱络合剂。 在照相材料的短暂均匀加热时,照相材料中的任何潜像银都被擦除。 照相材料在均匀加热之前可轻易操作。 在均匀加热之后,照相材料能够被成像曝光和加工以产生显影的银图像。 照相材料可以包含选定的卤化银显影剂。 通过(1)首先在足以消除照相材料中的任何潜像银的温度和时间的温度下均匀加热材料,然后(2)将材料曝光以产生在热可擦光照相材料中产生的显影图像 可开发的图像和(3)之后开发图像。 照相材料优选为光热敏成像材料。