Patent ID: 7273689
Filing Date: 2007-09-25
Classification: B41C

Abstract:
1. A method for eliminating at least one unwanted ink-receptive section in a printing plate following development of an imagewise exposed positive-working printing plate precursor, wherein said positive-working printing plate precursor comprises a developer resistant surface layer that remains effective in resisting development in areas of the positive-working printing plate precursor that are undesirably not exposed during exposure of the positive-working printing plate precursor, the method comprising: (a) identifying at least one of said undesirably unexposed areas of said positive-working printing plate precursor; and (b) prior to developing said positive-working printing plate precursor to form said printing plate, scoring said developer resistant layer in said at least one identified undesirably unexposed area to a depth and density sufficient to render said developer resistant layer ineffective to resist development of said at least one identified undesirably unexposed area.