Lithographic printing plates for use with laser-discharge imaging apparatus

  • US 5,339,737 A
  • Filed: 05/13/1993
  • Issued: 08/23/1994
  • Est. Priority Date: 07/20/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A lithographic printing member directly imageable by laser discharge, the member comprising:

  • a. a topmost first layer which is polymeric; and

    b. a second layer underlying the first layer; and

    c. a substrate underlying the second layer;

    whereind. the second layer is formed of a material which is subject to ablative absorption of imaging infrared radiation and the first layer is not; and

    e. the first layer and the substrate exhibit different affinities for at least one printing liquid selected from the group consisting of ink and an adhesive fluid for ink.

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