Silicon dioxide; chemicals for use in industry; adhesives and glues for industrial purposes; strontium; barium; barytes being barite, heavy spar; unprocessed plastics being plastics in primary form; photographic developers; photographic dry plates; photographic emulsions; photographic fixers; photographic paper being chemically-sensitized paper; photographic sensitizers; unexposed photographic film; wheat flour for industrial purposes; zinc oxide; calcium; silicon; cesium; cerium; lithium; ka...