WCO Explanatory Notes reproduced for reference. © World Customs Organization. Verify against official WCO publication.
70.08 - Multiple-waned insulating units of glass. This heading covers multiple-walled insulating units of glass, the most common e of which consists of two or more panels of glass (sheet, plate, float or even such types as ammered or cathedral) separated b a layer of dry air or inert gas, sometimes divlded internally into compartments. These s eets are sealed around the edges by a metal, plastic or other joint which makes a completely airtight unit. K "h" Another type of multi le-walled insulating glass consists of a sandwich of two sheets of glass with an interlayer of g ass fibre. f These types of glass, which are used for glazing windows, roofs, etc., provide a degree of heat and sound insulation and reduce condensation.
1.- This Chapter does not cover : (a) Goods of heading 32.07 (for example, vitrifiable enamels and glazes, glass frit, other glass in the form of powder, granules or flakes); (b) Articles of Chapter 71 (for example, imitation jewellery); (c) Optical fibre cables of heading 85.44, electrical insulators (heading 85.46) or fittings of insulating material of heading 85.47; (d) Front windscreens (windshields), rear windows and other windows, framed, for vehicles of Chapters 86 to 88; (e) Front windscreens (windshields), rear windows and other windows, whether or not framed, incorporating heating devices or other electrical or electronic devices, for vehicles of Chapters 86 to 88; (f) Optical fibres, optically worked optical elements, hypodermic syringes, artificial eyes, thermometers, barometers, hydrometers or other articles of Chapter 90; (g) Luminaires and lighting fittings, illuminated signs, illuminated name-plates or the like, having a permanently fixed light source, or parts thereof of heading 94.05; (h) Toys, games, sports requisites, Christmas tree ornaments or other articles of Chapter 95 (excluding glass eyes without mechanisms for dolls or for other articles of Chapter 95); or (ij) Buttons, fitted vacuum flasks, scent or similar sprays or other articles of Chapter 96. 2.- For the purposes of headings 70.03, 70.04 and 70.05 : (a) glass is not regarded as “worked” by reason of any process it has undergone before annealing; (b) cutting to shape does not affect the classification of glass in sheets; (c) the expression “absorbent, reflecting or non-reflecting layer” means a microscopically thin coating of metal or of a chemical compound (for example, metal oxide) which absorbs, for example, infra- red light or improves the reflecting qualities of the glass while still allowing it to retain a degree of transparency or translucency; or which prevents light from being reflected on the surface of the glass. 3.- The products referred to in heading 70.06 remain classified in that heading whether or not they have the character of articles. 4.- For the purposes of heading 70.19, the expression “glass wool” means : (a) Mineral wools with a silica (SiO ) content not less than 60 % by weight; 2 (b) Mineral wools with a silica (SiO ) content less than 60 % but with an alkaline oxide (K O or Na O) 2 2 2 content exceeding 5 % by weight or a boric oxide (BO ) content exceeding 2 % by weight. 2 3 Mineral wools which do not comply with the above specifications fall in heading 68.06. 5.- Throughout the Nomenclature, the expression “glass” includes fused quartz and other fused silica. Subheading Note. 1.- For the purposes of subheadings 7013.22, 7013.33, 7013.41 and 7013.91, the expression “lead crystal” means only glass having a minimum lead monoxide (PbO) content by weight of 24 %.