WCO Explanatory Notes reproduced for reference. © World Customs Organization. Verify against official WCO publication.
69.04 - Ceramic building bricks, flooring blocks, support or filler tiles and the like. 6904.10 - Building bricks 6904.90 - Other This headin covers non-refractory ceramic bricks (i.e., bricks unable to withstand temperatures or higher) of the kinds commonly used for building walls, houses, industrial of 1,500 chimney-stacks, etc. Such bricks remain in the heading even if the can also be used for other purposes (e.g., vitrified bricks which can be used for paving or bri ge piling, as well as for the construction of buildings). "8 B Bricks are usually relatively porous (common pottery), but some are more or less vitrified (stoneware or engineering bricks) and are then used in constructional work calling for great mechanical strength or resistance to acids (e-g., in chemical plant). The heading includes : (1) Ordinary solid bricks of rectangular shape, with flat or indented surfaces. (2) Curved bricks, sometimes perforated, for industrial chimney-stacks. (3) Hollow bricks, perforated bricks; long hollow flooring blocks and constructional slabs used particularly for flooring, ceilin s, etc., in combination with structura1 steelwork, and support or filler tiles (i.e., ceramic ittings designed to support the blocks while encasing the girders). k (4) Facin bricks (e.g., for facing houses or walls, the surrounds of doors or windows ing special bricks for column capitals, borders, friezes or other architecturaj inclut decoration). So-called " double " bricks specially perforated lengthwise, ready for splitting before use, remain in this heading provided that they retain the character of building bricks after separation. r All these bricks, especially those intended for facing, ma be polished, sand-faced (by fusin sand on to the surface durmg firing , covered with a thin ayer of white or coloured sli whic hides the colour of the body, smo ed or flamed, coloured in the body or on the s d a c e (b adding metallic oxides, by using ferru inous clay, or by heating in a reducin atmosphere wi hydrocarbons or carbon), impregnate with tar, or glazed, etc. They may a so have moulded, embossed or indented designs on one or two faces. f R. k X The heading also includes light bricks made from mixtures containing sawdust, peat fibres, chopped straw, etc., which are burned away during firing, leaving a very porous structure. The heading does not cover (a) Bricks of kieselguhr, etc. (heading 69.01) and refractory bricks (heading 69.02). (b) Flags and paving, hearth or wall tiles (see Explanatory Notes to headings 69.07 and 69.08).
1.- This Chapter applies only to ceramic products which have been fired after shaping : (a) Headings 69.04 to 69.14 apply only to such products other than those classifiable in headings 69.01 to 69.03; (b) Articles heated to temperatures less than 800 °C for purposes such as curing of resins, accelerating hydration reactions, or for the removal of water or other volatile components, are not considered to be fired. Such articles are excluded from Chapter 69; and (c) Ceramic articles are obtained by firing inorganic, non-metallic materials which have been prepared and shaped previously at, in general, room temperature. Raw materials comprise, inter alia, clays, siliceous materials including fused silica, materials with a high melting point, such as oxides, carbides, nitrides, graphite or other carbon, and in some cases binders such as refractory clays or phosphates. 2.- This Chapter does not cover : (a) Products of heading 28.44; (b) Articles of heading 68.04; (c) Articles of Chapter 71 (for example, imitation jewellery); (d) Cermets of heading 81.13; (e) Articles of Chapter 82; (f) Electrical insulators (heading 85.46) or fittings of insulating material of heading 85.47; (g) Artificial teeth (heading 90.21); (h) Articles of Chapter 91 (for example, clocks and clock cases); (ij) Articles of Chapter 94 (for example, furniture, luminaires and lighting fittings, prefabricated buildings); (k) Articles of Chapter 95 (for example, toys, games and sports requisites); (l) Articles of heading 96.06 (for example, buttons) or of heading 96.14 (for example, smoking pipes); or (m) Articles of Chapter 97 (for example, works of art).