… (3) Prepared chalks , usually made with a basis of calcium sulphate or of calcium sulphate and calcium carbonate, sometimes mixed with … matter. (4) Drawing charcoals , obtained usually by calcining spindle‑tree wood. (5) Crayons and pastels , …
… in water), on a base, generally mineral (barium sulphate, calcium sulphate, aluminium oxide, China clay, talc, silica, siliceous fossil earth, calcium carbonate, etc.). The fixation of the colouring …
… 23.06 ). (e) Fatty acids, acid oils from refining, fatty alcohols, glycerol (other than crude glycerol), prepared … fatty acids (palmitic, cerotic, myristic) with certain alcohols other than glycerol (cetyl, etc.). They contain a certain proportion of their acids and alcohols in the free state, and also some hydrocarbons. …
… and atmospheric nitrogen on sodium carbonate, by treating calcium cyanamide (see heading 31.02) with charcoal or by … for separating galena from blende and pyrites from chalcopyrite). (2) Potassium cyanide (KCN). Obtained by …
… or metals. (A) HYDRIDES The most important hydride is calcium hydride (CaH 2 ) (hydrolith) obtained by direct … of mercury fulminate as an explosive. (D) SILICIDES (1) Calcium silicide . Very hard, grey, crystalline masses. Used …
… different technologies, such as CRT (cathode-ray tube), LCD (liquid crystal display), DMD (digital micromirror … They may be based on CRT or flat panel (e.g., DMD, LCD, plasma) technology. (D) RECEPTION APPARATUS FOR … or satellite) which do not include a display device (CRT, LCD, etc.). These apparatus receive signals and convert them …
