Desensitizing gum for lithographic printing plates

Details Desensitizing gum for lithographic printing plates Desensitizing gum for lithographic printing plates

G - Physics

03

C

96/50

G03C 1/36 (2006.01) B41N 3/08 (2006.01)

Patent

CA 1208957

ABSTRACT OF THE DISCLOSURE A desensitizing gum for a lithographic printing plate and a gumming up process thereof are disclosed. The gum is comprised of water having dis- persed therein 5 to 35 wt%, based on the total weight of the gum, of a film-forming, water-soluble compound selected from the group consisting of enzyme-decomposed dextrine and enzyme-decomposed etherified dextrine. The desensitizing gum exerts a desensitizing action on non-image acreas of a lithographic printing plate and does not cause image blinding of image areas even when the plate is stored for a long period of time.

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