… oxide, boric acid, etc.) giving a smooth surface, either matt or glossy, by vitrification under heat. In most cases … to coat ceramic ware, either completely or in the form of a pattern. They are applied either before firing or after a …
… etc. (e.g., jackets, trousers, aprons, sleeves, gloves, mitts, gaiters, hoods and masks usually with mica eyepieces, helmets, boots with asbestos uppers or soles); mattresses; firemen’s shields, fire-extinguishing sheets, …
… water to produce acetylene; used for the production of the latter gas or of calcium cyanamide. (2) Silicon carbide … of refraction, and is nearly as hard as diamond but rather brittle. Used extensively as an abrasive and as a refractory …
… in pellets or cubes in glass jars. Solid sodium hydroxide attacks the skin and destroys the mucous membranes. It is … manufacture of regenerated cellulose, mercerising of cotton, tantalum or niobium metallurgy, production of hard …
… tempering qualities (e.g., vanadium steels); or increased cutting speed (e.g., chrome‑tungsten steels). Other alloy … 3 to 4 % of silicon and possibly aluminium. (5) Free‑cutting alloy steels which not only conform to the …
… stage of milling, which leaves the germ whole or slightly flattened (rolled). In order to improve its keeping qualities, the germ may be partly defatted or heat treated. Depending on the use to which it …
… which have been subjected to processes other than those permitted in Note 3, for example, coated or impregnated … tea‑bag paper). (5) Felt paper and paperboard . (6) Blotting paper . The heading also excludes fibreboard ( …
