Disclosed is a substantially water-free pre-treatment composition having at least one of an acid or an acid anhydride in an organic matrix. Also disclosed is a kit of parts having the pre-treatment composition and an ink composition that has an intrinsic inferior water fastness when printed, where the ink contains a compound that is soluble in alkaline environment (ink as such) and insoluble in a neutral and/or acidic environment. Also disclosed is a printing method for improving the water fastness of a print made with an ink that has intrinsically low water fastness, by using a pre-treatment composition as disclosed.
本发明公开了一种基本不含
水的前处理组合物,该组合物在有机基质中至少含有一种酸或酸酐。还公开了一种具有前处理组合物和油墨组合物的部件套件,该油墨组合物在印刷时具有固有的较差
水牢度,其中油墨含有一种可溶于碱性环境(油墨本身)而不溶于中性和/或酸性环境的化合物。此外,还公开了一种印刷方法,通过使用所公开的预处理组合物,提高使用固有
水牢度低的油墨印刷品的
水牢度。