This heading covers :(A) Waste and scrap of glass of all kinds arising from the manufacture of glass (including glass waste splashed outside the melting pots and subsequently recovered); also broken articles. Waste glass is generally characterised by its sharp edges. (B) Glass (including enamel glass), in the mass (i.e., in more or less regular blocks), with no particular intended use.
Enamel glass is of greater fusibility and higher density than most ordinary varieties of glass. It is usually opaque though occasionally transparent; it may be colourless or of various colours. It falls in this heading when in the mass (in lumps or slabs). It is used for colouring or opacifying other glass, for lampworking into ornaments, etc., and for enamelling pottery, etc.
The heading also includes vitrite in the mass, a type of glass with a low melting point, used for insulating the contact terminals at the base of electric light bulbs. It has a high manganese dioxide content which gives it a blackish colour so that the inner fittings of the base are concealed.
Glass (including vitrite and enamel glass) in the form of powder, granules or flakes is excluded (heading 32.07).
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