Pre-bake printing plate cmposition

Details Pre-bake printing plate cmposition Pre-bake printing plate cmposition

G - Physics

03

F

G03F 7/40 (2006.01) B41N 3/08 (2006.01)

Patent

CA 2100082

2100082 9214190 PCTABS00014 An aqueous composition useful for the protection of actinic light-exposed presensitized lithographic printing plates. The composition comprises an effective amount of (a) an ammonium, sodium, potassium or lithium salt of a strong organic acid, and (b) an ammonium, sodium, potassium or lithium salt of an anionic surfactant which contains functionalities of the salt of a strong organic acid and the salt of a week organic acid, and (c) an ammonium, sodium, potassium or lithium salt of a weak organic acid. The composition is applied to the surface of the plates after they have been developed, but before they have been baked, thereby preventing surface contamination that would otherwise occur from the heat treatment.

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