... No.:130125000002258Issuing Authority:Hebei Province Xingtang County Administration for Industry and CommerceDate of Issue:2001-08-09Date of Expiry:2010 ... absorb the gamma rays, X rays, and materials of high density and surface finish, and widely used in paints, inks, coatings, ... absorb the gamma rays, X rays, and materials of high density and surface finish, and widely used in paints, inks, coatings, ...