Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Finishing or perfecting composition or product
Patent
1987-02-09
1988-11-22
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Finishing or perfecting composition or product
430302, 430309, 430330, 524132, 524158, 524295, G03C 518
Patent
active
047865814
ABSTRACT:
A gumming solution is disclosed for use in the burning-in of irradiated and developed offset-printing plates. The gumming solution contains (a) water, (b) at least one hydrophilic polymer, and (c) at least one component derived from an organic acid. Component (b) comprises, for example, N-polyvinyl-pyrrolidone-(2) or polyacrylic acid, and component (c) comprises a water-soluble organic carboxylic acid, sulfonic acid, or phosphonic acid which has at least two acid functions and which is selected from the group consisting of benzene carboxylic acids, benzene sulfonic acids, benzene phosphonic acids, and alkane phosphonic acids, or one of the salts thereof (for example, disodium-benzene-1,3-disulfonate, mellitic acid, or methane-diphosphonic acid.) A process for the production of an offset-printing plate, using the aforesaid gumming solution in the burning-in of the plate, is also disclosed. With application of this gumming solution, washing of the printing plate prior to printing is rendered unnecessary, since the printing plate runs clean very rapidly during the printing process.
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Schell Loni
Stahlhofen Paul
Doody Patrick A.
Hoechst Aktiengesellschaft
Michl Paul R.
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