一种用于水溶性染料的储存稳定的浓缩液体染料制剂的制备方法，其特征在于，水溶液或悬浮液，至少一种阴离子粗染料跨半透离子基团去除具有低于水500和部分分离分子量的盐和合成副产物 具有1至500埃的引线，任选地进行干燥的孔径含有膜，和有机溶剂以及任选的其它添加剂用与水可混溶的，之前和/或通过所述半渗透膜的通过后添加。 将所得到的液体制剂染料特别适用于注射溶液用于皮革染色和印染纺织材料，特别是那些由纤维素制成。

A process for the preparation of storage-stable concentrated liquid dye preparations of water-soluble dyes, characterized in that an aqueous solution or suspension, at least one anionic crude dye zurAbtrennung of salts and synthesis byproducts having molecular weights below 500 and partial separation of water over a semi-permeable, ionic group-containing membrane with a pore diameter of 1 to 500 a leads, optionally dried, and with a miscible with water, organic solvent and optionally further additives, before and / or added after the passage through the semi-permeable membrane. The obtained liquid dyestuff preparations are particularly suitable for injection solutions for dyeing leather and for dyeing and printing textile materials, especially those made of cellulose.