g of zinc white zinc oxide 3 0 g of xylene 1 0 g of n butanol 0 35 g of borchigen nd borchers and 5 0 g of mineral spirits k60 were added to 30 0 g of a long oil alkyd resin alkydal f681tb from bayer this lacquer mixture was mixed with 0 15 g of a first siccative drier 69 from borchers 6 wt co and 0 50 g of a second siccative octa soligen ca 10 from borchers 10 wt ca and then combined with 0 077 g of composition le skinning was prevented for more than 17 days in an open test tube 160 u00d7 16 mm initial weight 5 0 the skinning time of the mixture without the anti skinning additive was 1 day under identical conditions the drying time of the resulting coating wet film thickness 100 u03bcm with anti skinning agent was 4 h determined according to din 53150 the drying time of a comparison coating without the anti skinning agent was 3 5 h under identical conditions the konig pendulum hardness determined according to din 53170 of the coating according to the invention was 35 s after 24 h drying time 48 s after 49 h and 64 s after 72 h the konig pendulum hardness of the comparison coating without the anti skinning additive was 32 s after 24 h 46 s after 49 h and 55 s after 72 h measured under identical conditions although the invention has been described in detail in the foregoing for.