Sublimed White Lead
View of largest Zinc Oxide Works in America, at Hazards, Pa.
Sublimed Blue Lead. Sublimed blue lead is made by burning coarsely broken lumps of galena, admixed with bituminous coal, in a special form of furnace. The fumes which are volatilized from this mixture are very complex in their chemical make-up, and in color are white, blue, and black. After being drawn through the cooling pipes by the suction of huge fans, whereby the fumes are cooled, the pigment is deposited in bags. This pigment is bluish black in color, and has been highly recommended for use on iron and steel. Its composition runs approximately as follows:
| Lead sulphate | 50% |
| Lead oxide | 35% |
| Lead sulphide | 5% |
| Lead sulphite | 5% |
| Zinc oxide | 2% |
| Carbon | 3% |
View of Zinc Oxide Furnaces