Artists have relied on original Permalba White for superior quality and permanence since 1921. It is an exclusive blend of Titanium and other pigments prepared by a special process, developed after extensive laboratory and practical testing. Acid and alkali resistant, it ranks highest among the most opaque pigments with greater covering power. Will not yellow with age and dries to an elastic film that has no tendency to crack. Painting mediums do not affect its integrity. Does not contain lead.