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    PRINTING PLATE
    3.
    发明专利
    PRINTING PLATE 未知

    公开(公告)号：AU3596778A

    公开(公告)日：1979-11-15

    申请号：AU3596778

    申请日：1978-05-10

    Applicant: POLYCHROME CORP

    Inventor： GOLDA EUGENE ,  WILKES ALAN LEONARD ,  CHU SIMON LONG

    IPC: G03F7/00 ,  B41N1/08 ,  G03F7/095 ,  G03F7/10 ,  B41C1/10

    Abstract: A method for producing a water developable lithographic printing plate which comprises treating at least one surface of a metal sheet substrate with a layer of a lithographically suitable, light sensitive, water soluble substance and subsequently coating the thus treated base sheet with an upper layer of a water insoluble, ink receptive, lithographically suitable photosensitive composition. Said photosensitive layers must be either both positive working or both negative working. Upon imagewise exposure through a mask by standard methods the exposed areas of said upper photosensitive composition are alternatively characterized as either water permeable or water impermeable and the unexposed areas are alternatively water impermeable or water permeable as opposed to the exposed areas. Upon said imagewise exposure, the exposed lower level areas in a negative system are rendered water insoluble whereas the exposed lower level areas in a positive system are rendered more water soluble than the unexposed areas.

    4.
    发明专利
    未知

    公开(公告)号：DE2821777A1

    公开(公告)日：1978-11-30

    申请号：DE2821777

    申请日：1978-05-18

    Applicant: POLYCHROME CORP

    Inventor： GOLDA EUGENE ,  WILKES ALAN LEONARD ,  CHU SIMON LONG

    IPC: G03F7/00 ,  B41N1/08 ,  G03F7/095 ,  G03F7/02

    Abstract: A method for producing a water developable lithographic printing plate which comprises treating at least one surface of a metal sheet substrate with a layer of a lithographically suitable, light sensitive, water soluble substance and subsequently coating the thus treated base sheet with an upper layer of a water insoluble, ink receptive, lithographically suitable photosensitive composition. Said photosensitive layers must be either both positive working or both negative working. Upon imagewise exposure through a mask by standard methods the exposed areas of said upper photosensitive composition are alternatively characterized as either water permeable or water impermeable and the unexposed areas are alternatively water impermeable or water permeable as opposed to the exposed areas. Upon said imagewise exposure, the exposed lower level areas in a negative system are rendered water insoluble whereas the exposed lower level areas in a positive system are rendered more water soluble than the unexposed areas.

    LITHOGRAPHIC PRINTING PLATES
    6.
    发明专利
    LITHOGRAPHIC PRINTING PLATES 未知

    公开(公告)号：AU3366478A

    公开(公告)日：1979-09-06

    申请号：AU3366478

    申请日：1978-02-28

    Applicant: POLYCHROME CORP

    Inventor： CHU SIMON LONG ,  GOLDA EUGENE ,  WILKES ALAN LEONARD

    IPC: B41N3/00 ,  B41N3/03 ,  G03F7/004 ,  B41C1/10 ,  C25D11/16 ,  C25D11/24

    Abstract: A method for preparing aluminum based lithographic printing plates which comprises treating at least one surface of an aluminum base sheet with an interlayer composition, thereafter anodizing the thus treated aluminun surface, optionally retreating the coated, anodized aluminum plate with another stratum of the interlayer composition and then applying to said surface a suitable light sensitive composition to yield the desired photosensitive lithographic printing plate of improved characteristics.

    7.
    发明专利
    未知

    公开(公告)号：NO774517L

    公开(公告)日：1978-11-21

    申请号：NO774517

    申请日：1977-12-30

    Applicant: POLYCHROME CORP

    Inventor： GOLDA EUGENE ,  WILKES ALAN LEONARD ,  CHU SIMON LONG

    IPC: G03F7/00 ,  B41N1/08 ,  G03F7/095 ,  B41N ,  G03F

    Abstract: A method for producing a water developable lithographic printing plate which comprises treating at least one surface of a metal sheet substrate with a layer of a lithographically suitable, light sensitive, water soluble substance and subsequently coating the thus treated base sheet with an upper layer of a water insoluble, ink receptive, lithographically suitable photosensitive composition. Said photosensitive layers must be either both positive working or both negative working. Upon imagewise exposure through a mask by standard methods the exposed areas of said upper photosensitive composition are alternatively characterized as either water permeable or water impermeable and the unexposed areas are alternatively water impermeable or water permeable as opposed to the exposed areas. Upon said imagewise exposure, the exposed lower level areas in a negative system are rendered water insoluble whereas the exposed lower level areas in a positive system are rendered more water soluble than the unexposed areas.

    8.
    发明专利
    未知

    公开(公告)号：DE2805219A1

    公开(公告)日：1978-09-07

    申请号：DE2805219

    申请日：1978-02-08

    Applicant: POLYCHROME CORP

    Inventor： CHU SIMON LONG ,  GOLDA EUGENE ,  WILKES ALAN LEONARD

    IPC: B41N3/00 ,  B41N3/03 ,  G03F7/004 ,  G03F7/00

    Abstract: A method for preparing aluminum based lithographic printing plates which comprises treating at least one surface of an aluminum base sheet with an interlayer composition, thereafter anodizing the thus treated aluminun surface, optionally retreating the coated, anodized aluminum plate with another stratum of the interlayer composition and then applying to said surface a suitable light sensitive composition to yield the desired photosensitive lithographic printing plate of improved characteristics.

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