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) Optical fibres, optically worked optical elements, hypodermic syringes, artificial eyes, thermometers, barometers, hydrometers or other articles of Chapter 90;
(e) Lamps or lighting fittings, illuminated signs, illuminated name-plates or the like, having a permanently fixed light source, or parts thereof of heading 94.05;
(f) 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
(g) 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 (SiO2) content not less than 60 % by weight;
(b) Mineral wools with a silica (SiO2) content less than 60 % but with an alkaline oxide (K2O or Na2O) content exceeding 5 % by weight or a boric oxide (B2O3) content exceeding 2 % by weight.
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.