Presensitized lithographic plate

Details Presensitized lithographic plate Presensitized lithographic plate

B - Operations, Transporting

41

C

101/61

B41C 1/10 (2006.01) B41N 3/03 (2006.01) G03F 7/11 (2006.01)

Patent

CA 1223771

ABSTRACT OF THE DISCLOSURE A presensitized lithographic plate is disclosed. The plate is comprised of a support base such as an aluminum support base having an anodized surface having a subbing layer positioned thereon which is coated with a light-sensitive layer. The light-sensitive layer is comprised of a diazo compound and a binder or comprised of a photopolymerizable composition. The subbing layer is comprised of a high molecular compound containing a sulfonic acid group-containing monomer units as recur- ring units. The subbing layer provides a lithographic plate which has greatly improved shelf life. The sub- bing layer increases the stability of the lithographic plate such that when the plate is stored it continues to be capable of producing copies which do not have stained background areas even when the plate is stored under adverse temperature and humidity conditions.

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