Bl This standard refers to compounds of lead, manganese and cobalt that are used as drying agents in the preparation of paints and related products. B-2 This standard covers two types of driers, namely:
——class A, which includes the most common driers, resinates and linoleic acids, as such and incorporated into oils, resins, petroleum derivatives or similar products — class B, which involves other types of driers, such as naphthenates and similar salts, both in the solid state and dispersed in suitable media generally free of resins.