Processing of printing plates

Details Processing of printing plates Processing of printing plates

G - Physics

03

G

96/266, 96/65

G03G 9/16 (2006.01) G03F 7/32 (2006.01)

Patent

CA 1061154

ABSTRACT OF THE DISCLOSURE A photopolymer layer which has been image wise exposed is processed by contacting the layer with a developer comprising a lactam to selectively remove the non-light struck areas of the layer. The developer may additionally include an acid, a wetting agent, an inert diluent and/or a conventional developer for the image-wise exposed polymer. Examples of preferred lactams are 1-methyl-2-pyrrolidinone, 1-butyl-2-pyrrolidinone, 1-cyclohexyl-2-pyrrolidinone, 2-pyrrolidinone, 1-vinyl-2- pyrrolidinone and .epsilon.-caprolactam. The developer is particularly useful for developing image-wise exposed photopolymer layers in the photomechanical production of lithographic printing plates.

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