… Mineral substances not elsewhere specified or included. …
Explanatory notes
… mainly as anti‑rust pigments are classified in this heading although they naturally contain more than 70 % by weight of … silicate of magnesia, white, yellowish, grey or pink, found almost exclusively in Asia Minor. It is obtained in small … waste of natural meerschaum with binding agents (oils, alum, etc.) under the influence of heat. It falls here only …