| 摘要 |
PURPOSE:To improve the ink receptivity, the anti-satining property or the like of a planographic printing plate, by using a composition containing an inorg. fine particle with an average particle size of 0.1mum or less and a specific org. compound as a plate surface treating liquid for a printing plate such as a silver salt planographic plate. CONSTITUTION:A fine particle with an average particle size of 0.1mum or less such as colloidal silica or colloidal alumina and a compound shown by formula (wherein R1 is alkyl group, aryl group or aralkyl group, R2 shows a group containing a group shown by formula II or III, m is an integer of 1 or more and n is an integer of 2 or more) are added in an amount of about 1-100g per 1l liquid to be used and a desensitization promotor, a buffer, a preservative or the like are further added to perform mixing. This obtained plate surface treating liquid composition is especially useful in treating a silver salt planographic printing plate having a non-image part formed of a hydrophilic high molecular binder such as gelatine or starch. |
