Pigment-free mixtures, containing a) at least one optical brightener and b) at least one (co)polymer, with at least one N-vinylcarboxamide incorporated in the polymer and/or at least one nitrogen-containing heterocyclic ring and/or which may form a nitrogen-containing heterocyclic ring.
不含
颜料的混合物,含有 a) 至少一种光学增白剂和 b) 至少一种(共)聚合物,聚合物中含有至少一种 N-
乙烯基甲酰胺和/或至少一种含氮杂环和/或可形成含氮杂环。