Compounds of this kind include,for example, dimethylamine; diethylamine; dibutylamine; diphenylamine; N-methyl-aniline; N-methylbenzylamine; pyrrolidine; piperidine; morpholine; pyrazole; imidazole and indole.The usual additives and auxiliary agents used in the art of lacquering such as pigments, flue agents, dyestuffs, plasticizers and fillers may, of course, be added (in amounts from 0.05 to 20%