A process for tinting a molded article is disclosed. The process entails applying
by spraying or by flow coating a hot, dye-solution onto at least a portion of the
surface of a molded article to obtain a tinted article and washing the tinted article.
In addition to the dissolved dye, the dye solution that is substantially free of
particulate matter contains an aqueous solution of a carrier and an optional emulsifier.
The article is one molded of a thermoplastic molding composition. In an embodiment
of the invention, the dye solution is prepared by filtering a hot aqueous solution
through a bag filter that contains a dye to obtain a hot, dye-solution. In a further
embodiment, activated carbon is used to purify the dye solution to obtain a dye-free
aqueous solution.