… salts, organic acids, etc. They are generally brown, yellow or reddish in colour. The principal tanning … tanning substances ( heading 32.02 ). (c) Residual lyes from the manufacture of wood pulp, whether or not … All these tannins are generally in the form of white or yellowish amorphous powders which turn brown on exposure to …
… coating or covering can be seen with the naked eye otherwise than by a resulting change in colour. Textile … not be confused with fabrics which are simply assembled in layers by means of a plastic adhesive (generally fall in …
… 2 ). Hydrated, greenish plates or powder; amorphous, a yellow powder. Used in metallurgy and in electroplating. … Tetrasodium hexacyanoferrate (Na 4 Fe(CN) 6 .10H 2 O). Yellow crystals, unaffected by air, soluble in water, …
… recognisable at the edges of the board with the naked eye. However, in some cases, microscopic examination may be … covers : (1) Oriented strand board , which is made from layers of thin strands of wood which are at least twice as … or phenolic resins, interleaved together and laid down in layers forming a thick mat in which the strands are …
… its salts 2939.59 - - Other - Alkaloids of rye ergot and their derivatives; salts thereof : 2939.61 - - … in Calabar-beans; colourless crystals which turn reddish-yellow when exposed to air; used in medicine. (4) … , found in the plant Colchicum autumnale . Gummy mass, yellow powder, crystals or flakes; used in medicine; very …
