Method for making dry planographic printing plate

Details Method for making dry planographic printing plate Method for making dry planographic printing plate

G - Physics

03

F

96/2

G03F 7/40 (2006.01) G03F 7/022 (2006.01) G03F 7/075 (2006.01)

Patent

CA 1248388

TITLE OF THE INVENTION Method for Making Dry Planographic Printing Plate ABSTRACT OF THE DISCLOSURE A method for making a dry planographic printing plate, which comprises: exposing through a negative transparency a dry negative working presensitized plate comprising a base substrate having provided thereon, in order, a photosensitive layer containing an orthoquinonediazide compound and a silicone rubber layer; developing the exposed plate; exposing the developed plate to light so as to make its exposure value not less than 5% of the exposure value at the time of the exposure through the negative transparency; and then treating the exposed plate with a basic compound. - 1 -

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