HTS Code 3206-Inorganic or mineral colouring matter, n.e.s.; preparations based on inorganic or mineral colouring matter of a kind used for colouring any material or produce colorant preparations (excluding preparations of heading 3207, 3208, 3209, 3210, 3213 and 3215); inorganic products of a kind used as luminophores, whether or not chemically defined