Zirconium is a most useful & efficient auxiliary drier. Zirconium like lead serves as a through drier & is generally used in combination with Cobalt, Manganese & Calcium. Unlike Lead,
Zirconium is a poor pigment wetting & dispersing agent. Zirconium is an active cross-linking agent & as such improves hardness of stoved films as well as their adhesions.
Zirconium is not as effective in Phenolic resin based media it is recommended as a catalyst for epscy esters. Use of Lead driers in combination with Zirconium is to be avoided totally.