... shell of picture tubes, electronic ceramics, purified water, pigments, coatings, and other barium salt;2, used in making optical glasses ... used in making fireworks and signal flare;4, used in coatings of ceramics and accessories of optical glasses;5, used in ... materials of making other barium salts, ceramics, enamels, pigments, coatings, rubber, and welding rod;7, used in purifying agent and raticide ...