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Flexographic printing element having an IR ablatable layer and process for making a flexographic printing plate

  • US 5,262,275 A
  • Filed: 08/07/1992
  • Issued: 11/16/1993
  • Est. Priority Date: 08/07/1992
  • Status: Expired due to Term
First Claim
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1. A photosensitive printing element used for preparing flexographic printing plates comprising in the order listed:

  • (a) a support,(b) a photopolymerizable layer comprising an elastomeric binder, at least one monomer and an initiator having sensitivity to non-infrared actinic radiation, said layer being soluble, swellable or dispersible in a developer solution;

    (c) at least one barrier layer which is soluble, swellable or dispersible or liftable in the developer solution for the photopolymerizable layer and which is substantially transparent to actinic radiation; and

    (d) at least one layer of infrared radiation sensitive material which is substantially opaque to actinic radiation,wherein the infrared-sensitive material is ablatable form the surface of the barrier layer upon exposure to infrared laser radiation.

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