Harmonized System

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Section VII > Chapter 40 > Heading 4001

Explanatory notes

… coagulate spontaneously a few hours after tapping; it must therefore be stabilised in order to ensure preservation and to prevent putrefaction or coagulation. This is usually done by adding … latex before coagulation. These crumbling agents have no effect on the subsequent use or properties of the rubber. …

Section XVI > Chapter 84 > Heading 8401

Explanatory notes

… (2) The moderator and, where appropriate, the neutron reflector (e.g., beryllium, graphite, water, heavy water, … essential character of parts of a nuclear reactor and must therefore be classified in their own appropriate headings … centrifuges are treated internally against the corrosive effects of uranium hexafluoride. In practice, a very large …

Section XIII > Chapter 70 > Heading 7017

Explanatory notes

… other fused silica 7017.20 - Of other glass having a linear coefficient of expansion not exceeding 5 x 10 -6 per Kelvin … support plates, microscope slides and cover glasses, etc. Reference should be made to Explanatory Note to heading …

Section XVIII > Chapter 90 > Heading 9023

Explanatory notes

… of gravity), Magdeburg hemispheres (for demonstrating the effects of atmospheric pressure), the’s Gravesande ring (for … or the functioning of an important part; panels showing, in relief, for example, the assembly of a radio (for … purposes are classified in their respective headings. (10) Relief maps (of provinces, towns, mountain ranges, etc.), …

Section XVIII > Chapter 90 > Heading 9001

Explanatory notes

… of concentric layers of glass or plastics of different refractive indices. Those drawn from glass have a very thin … to produce the required optical properties. It applies therefore to elements which have been ground and polished as … in such a way that they produce a required optical effect.  An optical element does more than merely allow …

Section V > Chapter 27 > Heading 2712

Explanatory notes

… or by mixing paraffin wax or ceresine with a sufficiently refined mineral oil. The heading includes the jelly, whether … crude (sometimes called petrolatum ), decolourised or refined. It also covers petroleum jelly obtained by … They are hard and dark when crude, but may be white when refined.        Peat wax is physically and chemically …

Section XI > Chapter 51 > Heading 5105

Explanatory notes

… the wool or animal hair is not first carded but before combing undergoes a “preparing” process in which the … wound into the form of a ball, known as a “top”. Materials, chiefly hairs, which will not ball easily often leave this … covers the slubbings, carded slivers, tops and rovings referred to above, and also cut or broken tops and cut or …

Section XII > Chapter 64 > Heading 6401

Explanatory notes

… Explanatory Note, paragraphs (C) and (D)), of rubber (as defined in Note 1 to Chapter 40), plastics or textile … the lining of the article, is placed in a mould with either preforms or granules.        The mould is closed and placed … temperature.        Under the influence of the heat, the preforms or granules acquire a certain degree of viscosity …

Section XV > Chapter 79

Explanatory notes

… of silicate ores) electrolysis. (I)   Thermal reduction is effected by heating the oxide or silicate with coke in … impure zinc may be used directly for galvanising, or may be refined by various methods.        Some impure metal is also … in dilute sulphuric acid. This solution of zinc sulphate is carefully purified to remove cadmium, iron, copper, etc., …

Section VI > Chapter 28 > Heading 2811

Explanatory notes

… or from silicon fluorides. It is used for the electrolytic refining of tin and lead, for preparing fluorosilicates, … straw, feathers or gelatin, the sulphite process in sugar refining, preservation of fruit or vegetables, the …