GLASS AND GLASSWARE
Chapter Notes.
1.-This Chapter does not cover :
(a) Goods of heading No. 32.07 (for example vitrifiable enamels and glazes glass frit other glass in the form of powder granules or flakes);
(b) Articles of CHAPTER71 (for example imitation jewellery);
(c) Optical fibre cables of heading No. 85.44 electrical insulators (heading No. 85.46 or fittings of insulating material of heading No. 85.47;
(d) Optical fibres optically worked optical elements hypodermic syringes artificial eyes thermometers barometers hydrometers or other articles of CHAPTER90;
(e) Lamps or lighting fittings illuminated signs illuminated name-plates or the like having a permanently fixed light source or parts thereof of heading No. 94.05;
(f) Toys games sports requisites Christmas tree ornaments or other articles of CHAPTER95 (excluding glass eyes without mechanisms for dolls or for other articles of CHAPTER95); or
(g) Buttons fitted vacuum flasks scent or similar sprays or other articles of Chapter 96
2.-For the purposes of headings Nos. 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 No. 70.06 remain classified in that heading whether or not they have the character of articles.
4.-For the purposes of heading No. 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 No. 68.06
5.-Throughout the Nomenclature the expression " glass " includes fused quartz and other fused silica.
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Subheading Note.
1.-For the purposes of subheadings Nos. 7013.21 7013.31 and 7013.91 the expression " lead crystal " means only glass having a minimum lead monoxide (PbO) content by weight of 24 %.
GENERAL
This Chapter covers glass in all forms and articles of glass (other than goods excluded by Note 1 to this Chapter or covered more specifically by other headings of the Nomenclature).
Glass (except fused quartz and other fused silica referred to below) is a fused homogeneous mixture in varying proportions of an alkali silicate (of sodium or potassium) with one or more silicates of calcium and lead and accessorily of barium aluminium manganese magnesium etc.
There are many varieties of glass according to their composition (e.g. Bohemian glass crown glass lead crystal glass flint glass strass paste). These various types are non-crystalline (amorphous) and wholly transparent.
The various headings of this Chapter cover the corresponding articles irrespective of the variety of glass of which they consist.
Manufacturing processes vary considerably and include :
(A) Casting (e.g. for plate glass).
(B) Rolling (e.g. for plate glass or wired glass).
(C) Floating (for float glass).
(D) Moulding whether or not combined with pressing blowing or drawing (e.g. for the manufacture of bottles tumblers certain types of optical glass ashtrays).
(E) Blowing mechanical or non-mechanical with or without moulds (e.g. for the manufacture of bottles ampoules ornaments and sometimes for the manufacture of sheet glass).
(F) Drawing or extruding (particularly for sheet glass rods tubes and piping and fibre glass).
(G) Pressing generally with moulds frequently used as the manufacturing process for e.g. ashtrays and also in combination with rolling (e.g. for figured rolled glass) or blowing (e.g. for bottles).
(H) Lampworking with the aid of a blow lamp (for the manufacture of ampoules fancy articles etc. from glass rod or tubing).
(IJ) Cutting out the required articles from blanks spheres etc. obtained by any process (articles of fused quartz or other fused silica in particular are often obtained from blanks of solid or hollow section).
For multicellular glass see the Explanatory Note to heading 70.16.
In certain cases the method of manufacturing the articles determines their classification in this Chapter. For example heading 70.03 applies only to cast or rolled glass and heading 70.04 only to drawn or blown glass.
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Note 5 to this Chapter provides that the expression " glass " includes fused quartz and other fused silica.
This Chapter also covers :
(1) Milk or opal glasses which are translucent and are obtained by adding materials such as fluorspar or bone ash (in the proportion of about 5 %) to the mass of the glass; the added material gives rise to partial crystallisation in the melt on cooling or reheating.
(2) Special materials known as glass-ceramics in which the glass is converted into an almost wholly crystalline material by a process of controlled crystallisation. They are made by adding to the glass batch nucleating agents which are often metal oxides (such as titanium dioxide and zirconium oxide) or metals (such as copper powder).
After the article has been shaped by ordinary glass-making techniques it is maintained at a temperature such as to ensure crystallisation of the glassy body around the nucleating crystals (devitrification). Glass-ceramics may be opaque or sometimes transparent. They have much better mechanical electrical and heat-resistant properties than ordinary glass.
(3) Glass having a low coefficient of expansion e.g. borosilicate glass.
20 HEADINGS
70.01 - CULLET AND OTHER WASTE AND SCRAP OF GLASS; GLASS IN THE MASS.
70.02 - GLASS IN BALLS (OTHER THAN MICROSPHERES OF HEADING No. 70.18) RODS OR TUBES UNWORKED.
70.03 - CAST GLASS AND ROLLED GLASS IN SHEETS OR PROFILES WHETHER OR NOT HAVING AN ABSORBENT REFLECTING OR NON-REFLECTING LAYER BUT NOT OTHERWISE WORKED.
70.04 - DRAWN GLASS AND BLOWN GLASS IN SHEETS WHETHER OR NOT HAVING AN ABSORBENT REFLECTING OR NON-REFLECTING LAYER BUT NOT OTHERWISE WORKED.
70.05 - FLOAT GLASS AND SURFACE GROUND OR POLISHED GLASS IN SHEETS WHETHER OR NOT HAVING AN ABSORBENT REFLECTING OR NON-REFLECTING LAYER BUT NOT OTHERWISE WORKED.
70.06 - GLASS OF HEADING No. 70.03 70.04 OR 70.05 BENT EDGE-WORKED ENGRAVED DRILLED ENAMELLED OR OTHERWISE WORKED BUT NOT FRAMED OR FITTED WITH OTHER MATERIALS.
70.07 - SAFETY GLASS CONSISTING OF TOUGHENED (TEMPERED) OR LAMINATED GLASS.
70.08 - MULTIPLE-WALLED INSULATING UNITS OF GLASS.
70.09 - GLASS MIRRORS WHETHER OR NOT FRAMED INCLUDING REAR-VIEW MIRRORS.
70.10 - CARBOYS BOTTLES FLASKS JARS POTS PHIALS AMPOULES AND OTHER CONTAINERS OF GLASS OF A KIND USED FOR THE CONVEYANCE OR PACKING OF GOODS; PRESERVING JARS OF GLASS; STOPPERS LIDS AND OTHER CLOSURES OF GLASS (+) .
70.11 - GLASS ENVELOPES (INCLUDING BULBS AND TUBES) OPEN AND GLASS PARTS THEREOF WITHOUT FITTINGS FOR ELECTRIC LAMPS CATHODE-RAY TUBES OR THE LIKE.
70.12 - GLASS INNERS FOR VACUUM FLASKS OR FOR OTHER VACUUM VESSELS.
70.13 - GLASSWARE OF A KIND USED FOR TABLE KITCHEN TOILET OFFICE INDOOR DECORATION OR SIMILAR PURPOSES (OTHER THAN THAT OF HEADING No. 70.10 OR 70.18).
70.14 - SIGNALLING GLASSWARE AND OPTICAL ELEMENTS OF GLASS (OTHER THAN THOSE OF HEADING No. 70.15) NOT OPTICALLY WORKED.
70.15 - CLOCK OR WATCH GLASSES AND SIMILAR GLASSES GLASSES FOR NON-CORRECTIVE OR CORRECTIVE SPECTACLES CURVED BENT HOLLOWED OR THE LIKE NOT OPTICALLY WORKED; HOLLOW GLASS SPHERES AND THEIR SEGMENTS FOR THE MANUFACTURE OF SUCH GLASSES.
70.16 - PAVING BLOCKS SLABS BRICKS SQUARES TILES AND OTHER ARTICLES OF PRESSED OR MOULDED GLASS WHETHER OR NOT WIRED OF A KIND USED FOR BUILDING OR CONSTRUCTION PURPOSES; GLASS CUBES AND OTHER GLASS SMALLWARES WHETHER OR NOT ON A BACKING FOR MOSAICS OR SIMILAR DECORATIVE PURPOSES; LEADED LIGHTS AND THE LIKE; MULTICELLULAR OR FOAM GLASS IN BLOCKS PANELS PLATES SHELLS OR SIMILAR FORMS.
70.17 - LABORATORY HYGIENIC OR PHARMACEUTICAL GLASSWARE WHETHER OR NOT GRADUATED OR CALIBRATED.
70.18 - GLASS BEADS IMITATION PEARLS IMITATION PRECIOUS OR SEMI-PRECIOUS STONES AND SIMILAR GLASS SMALLWARES AND ARTICLES THEREOF OTHER THAN IMITATION JEWELLERY; GLASS EYES OTHER THAN PROSTHETIC ARTICLES; STATUETTES AND OTHER ORNAMENTS OF LAMP-WORKED GLASS OTHER THAN IMITATION JEWELLERY; GLASS MICROSPHERES NOT EXCEEDING 1 mm IN DIAMETER.
70.19 - GLASS FIBRES (INCLUDING GLASS WOOL) AND ARTICLES THEREOF (FOR EXAMPLE YARN WOVEN FABRICS) (+) .
70.20 - OTHER ARTICLES OF GLASS.