| 摘要 |
PURPOSE:To turn a corrcted part perfectly hydrophilic in a short time, and to obtain a printing print superior in printing resistance in a nonodorous condition, by using a correcting agent contg. a specified s-triazine compd. for correction of a printing plate having a silver image receiving a printing ink. CONSTITUTION:A triazine compd. represented by the shown formula in which R1, R2 are mercapto or hydroxy is dissolved in an org. solvent, water, or a mixture of them by 0.1-20wt% to prepare a nonodorous correcting soln. Said compd. is nonvolatile and stable, and the corrected part of the silver image part of an offset plate having the silver image receiving a printing ink is turned hydrophilic by wiping it with absorbent cotton soaked with said correcting soln. to obtain a corrected plate immediately usable, and besides, the corrected part is superior in printing resistance, and ink stains do not occur even over 5,000 times of printing. |
