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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.
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