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    Photochemical recording process
    51.
    发明授权
    Photochemical recording process 失效
    光化学记录过程

    公开(公告)号：US3579336A

    公开(公告)日：1971-05-18

    申请号：US3579336D

    申请日：1967-12-15

    申请人： AGFA GEVAERT NV

    发明人： BRINCKMAN ERIC MARIA ,  HEUVEL WALTER AUGUST VAN DEN ,  VANHALST JOHAN EUGEEN

    IPC分类号： G03C1/64 ,  G03C1/56 ,  G03C1/58

    CPC分类号： G03C1/64

    摘要： PROCESS OF REPRODUCTION USING A RECORDING LAYER CONTAINING HEXACYANOFERRATE (III) IONS AND A SUBSTANCE PROVIDING IONS OF SELECTED METALS, PREFERABLY AN N-TYPE PHOTOCONDUCTOR. THE LAYER IS EXPOSED TO AN ELECTROMAGNETIC RADIATION IMAGE REDUCING THE HEXACYANOFERRATE (III) IONS IN THE EXPOSED REGIONS TO HEXACYANOFERRATE (II) IONS. THE EXPOSED LAYER IS DEVELOPED BY CONTACTING UNIFORMLY WITH AN AQUEOUS DEVELOPING SOLUTION CONTAINING A DYE INTERMEDIATE WHICH IS OXIDIZABLE INTO A DYE. THE HEXACYANOFERRATE (III) IONS IN THE UNEXPOSED REGIONS OXIDIZE THE DYE INTERMEDIATE AND ARE IN TURN REDUCED TO HEXACYANOFERRATE (II) IONS WHICH COMBINE WITH THE METAL IONS TO FORM A PRECIPITATE HAVING A STRONG AFFINITY FOR THE DYE OXIDATION PRODUCT. IF THE EXPOSURE IS THROUGH A POSITIVE ORIGINAL, A POSITIVE COPY IS OBTAINED SINCE THE IMAGE AREAS OF THE ORIGINAL SHIELD THE CORRESPONDING AREAS OF THE RECORDING LAYER FROM EXPOSURE. A LAYER CONTAINING PHOTOCONDUCTIVE ZINC OXIDE IS ESPECIALLY PREFERRED.