… 0.2 mm ( heading 76.06 ). (e) Foil in the form of Christmas tree decorations ( heading 95.05 ). ° ° ° … may have been subjected to the following working or surface treatments : (1) Heat treatments, such as stress‑relieving …
… superficial structure has been modified by appropriate treatment (with heat, chemicals, etc.) in order to make them … These products are obtained by chemical or heat treatment of certain vegetable or mineral substances (clay, … of natural impurities or added foreign matter. This treatment causes a change in the structure of the basic …
… of the ore by washing, or by crushing and flotation. (II) Treatment of the oxide by roasting, magnetic separation, or … hammered, rolled or extruded. Tin is very resistant to atmospheric corrosion but is attacked by concentrated acids. …
… completely pure. Aluminium may also be obtained by the treatment of certain other ores such as leucite (double … artificially in greater depth by anodising or chemical treatment; the surface is also sometimes coloured during … Certain of the alloys may be improved by age‑hardening treatments. These processes may be followed by tempering. …
… wood chips after they have received preliminary heat treatment to soften them and allow an easier separation of … produced from roundwood or blocks in stone grinders at atmospheric pressure. Pressurised stone groundwood (PGW) … at atmospheric pressure. Thermo‑mechanical pulp (TMP) produced from wood chips or wafers in refiners after …
