Process for preparing dyes and/or brightener formulations

摘要

This invention relates to a process for preparing formulations comprising dyes and/or brighteners which possess at least one free SO3H and/or COOH group, in which an aqueous suspension comprisinga) dyes and/or brighteners which possess at least one free SO3H and/or COOH group andb) inorganic synthesis saltsis desalinated using a microfiltration membrane having pore diameters of from 0.05 to 40 mum.