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    • 3. 发明授权
    • Processes and compositions for converting zero valent metals photographic images to formazan dye images
    • 将零色金属摄影图像转换为FORMAZAN DYE图像的处理和组合
    • US3642478A
    • 1972-02-15
    • US3642478D
    • 1970-02-25
    • EASTMAN KODAK CO
    • BRAULT ALBERT TBISSONETTE VERNON L
    • C09B50/02G03C5/46G03C5/56G03C5/24G03C5/44
    • G03C5/46C09B50/02G03C5/56
    • A zero valent metal image in which the metal has a standard oxidation potential more positive than -0.98 volt is advantageously replaced by a formazan dye by the single process step of contacting the metal image with a solution of a ligand in the presence of a tetrazolium salt when the combination of tetrazolium salt and ligand with water and zero valent metal produces a solution reaction potential E greater than +0.01 volt, the process forming a good dye image when the formazan dye is nondiffusible and the process blixing the metal image when the formazan dye is diffusible and the metal-ligand complex is diffusible. Compositions of tetrazolium salt and ligand are advantageously used in this single step process for dye image formation or for blixing a metal image.
    • 其中金属具有比-0.98伏特更正的标准氧化电位的零价金属图像有利地由甲an染料替代,通过单一工艺步骤将金属图像与配体在四唑鎓盐存在下的溶液接触 当四唑盐和配体与水和零价金属的组合产生大于+0.01伏的溶液反应电位E时,当甲an染料不可扩散时,该方法形成良好的染料图像,当甲an染料 是可扩散的并且金属 - 配体络合物是可扩散的。 四唑鎓盐和配体的组合物有利地用于用于染料图像形成或混合金属图像的该单步骤方法中。