Which method is used to prepare white lead?

The Dutch process (or stack process) was formerly the principal method by which white lead was prepared. It consisted building a stack of earthenware pots containing acetic acid upon a thick layer of spent  tanor manure and placing strips or coils of metallic lead over the pots; boards were then laid to form a false floor over the whole and more stacks built on top. The structure was then sealed and over time the metallic lead converted into lead carbonate corrosion caused by the action of the acetic acid vapour in the presence of carbon dioxide.