Etch bleaching liquid.
    1.
    发明公开
    Etch bleaching liquid. 失效
    蚀刻漂白液。

    公开(公告)号:EP0000081A1

    公开(公告)日:1978-12-20

    申请号:EP78200021.0

    申请日:1978-06-01

    IPC分类号: G03C5/40 G03F7/06

    摘要: An aqueous acidic etch-bleach solution comprising hydrogen peroxide, iron(III)ions and inorganic anions that form a silver salt having a solubility product not greater than 1×10 -8 determined in water at 20°C, characterized in that said solution contains in dissolved state as combination of H 2 O 2 - stabilizing agents citric acid and a polymer containing alkylene oxide units. Said combination provides a solution to the problem of producing ecologically acceptable and stable H 2 O 2 -solutions containing iron(III)ions.
    The etch-bleach solution is useful for the production of coloured relief images and lithographic printing plates starting from silver images.

    摘要翻译: 一种包含过氧化氢,铁(III)离子和形成银盐的无机阴离子的水性酸性蚀刻 - 漂白剂溶液,所述阴离子在20℃的水中测定时具有不大于1×10 -8的溶度积,其特征在于所述溶液含有 以溶解状态作为H 2 O 2稳定剂柠檬酸和含环氧烷单元的聚合物的组合。 所述组合为产生含有铁(III)离子的生态学可接受且稳定的H 2 O 2溶液的问题提供了解决方案。 该蚀刻漂白剂溶液可用于从银图像开始制作彩色浮雕图像和平版印刷版。