WCO Explanatory Notes reproduced for reference. © World Customs Organization. Verify against official WCO publication.
25.25 - Mica, including splittings; mica waste. 2525.10 2525.20 2525.30 - Crude mica and mica rifted into sheets or splittings - Mica powder - Mica waste Mica (muscovite, phlogopite, biotite, etc.) constitutes a group of natural complex aluminium silicates characterised by the fact that they are readily split into glistening, transparent, flexible sheets of varied colour. The heading includes : (A) Crude mica, which consists of mica crystals, of irregdar shape, size and thickness, covered with earth (" books "). (B) Mica sheets, obtained by riffing cobbed and trimmed books. The sheets take the shape of irregular polygons, like the crystals from which they were obtained, and their edges are roughly tnmmed and bevelled. Their thickness usually varies from 200 to 750 micrometres (microns). (C) Mica s littings, obtained by rifting sheet mica. Like the sheets fiom which they have been rifted, t ey have the shape of irregular polygons. Their edges are roughly trimmed. I: They are marketed as : (1) Condenser film, usually of a thickness between 25 and 200 micrometres (microns), or (2) Splittings, usually of a thickness between 12 and 30 micrometres (microns), used solely for the manufacture of built-up mica (e.g., micanite). The heading also includes mica waste and powder. The headin excludes products obtained b cutting-out or die-stamping from mica sheets or splittings (heading 6 .14 or Chapter 85), and pro ucts made from bonded (built-up) splittings (e.g., micanite, micafolium) or from pulped (reconstituted) mica (heading 68.14). f dY Vermiculite, a mineral allied to mica, faIls in heading 25.30, as do perlite and the chlorites (minerals chemically related to vermiculite). -
1.- Except where their context or Note 4 to this Chapter otherwise requires, the headings of this Chapter cover only products which are in the crude state or which have been washed (even with chemical substances eliminating the impurities without changing the structure of the product), crushed, ground, powdered, levigated, sifted, screened, concentrated by flotation, magnetic separation or other mechanical or physical processes (except crystallisation), but not products which have been roasted, calcined, obtained by mixing or subjected to processing beyond that mentioned in each heading. The products of this Chapter may contain an added anti-dusting agent, provided that such addition does not render the product particularly suitable for specific use rather than for general use. 2.- This Chapter does not cover : (a) Sublimed sulphur, precipitated sulphur or colloidal sulphur (heading 28.02); (b) Earth colours containing 70 % or more by weight of combined iron evaluated as Fe O 2 3 (heading 28.21); (c) Medicaments or other products of Chapter 30; (d) Perfumery, cosmetic or toilet preparations (Chapter 33); (e) Dolomite ramming mix (heading 38.16); (f) Setts, curbstones or flagstones (heading 68.01); mosaic cubes or the like (heading 68.02); roofing, facing or damp course slates (heading 68.03); (g) Precious or semi-precious stones (heading 71.02 or 71.03); (h) Cultured crystals (other than optical elements) weighing not less than 2.5 g each, of sodium chloride or of magnesium oxide, of heading 38.24; optical elements of sodium chloride or of magnesium oxide (heading 90.01); (ij) Billiard chalks (heading 95.04); or (k) Writing or drawing chalks or tailors' chalks (heading 96.09). 3.- Any products classifiable in heading 25.17 and any other heading of the Chapter are to be classified in heading 25.17. 4.- Heading 25.30 applies, inter alia, to : vermiculite, perlite and chlorites, unexpanded; earth colours, whether or not calcined or mixed together; natural micaceous iron oxides; meerschaum (whether or not in polished pieces); amber; agglomerated meerschaum and agglomerated amber, in plates, rods, sticks or similar forms, not worked after moulding; jet; strontianite (whether or not calcined), other than strontium oxide; broken pieces of pottery, brick or concrete.