Lead is a through drier & is always used with cobalt &/or
manganese. Lead drier improves the drying time of
double boiled linseed oil & yields very pale & clear boiled
oil.
Lead in combination with cobalt & calcium are suggested,
particularly for long oil alkyds lead is the most
important drier. However some of the problems connected with lead
driers such as Sulphur staining &
reaction with polybasic acids are overcome by inclusion of calcium
drier. As lead is toxic in nature its
usage in toys & edible film packaging is to be avoided.
