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BRAZIL WOOD

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Originally appearing in Volume V04, Page 463 of the 1911 Encyclopedia Britannica.
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BRAZIL See also:WOOD , a dye wood of commercial importance, obtained from the See also:West Indies and See also:South See also:America, belonging to the genera Caesalpinia and Peltophorum of the natural See also:order See also:Leguminosae. There are several See also:woods of the See also:kind, commercially distinguished as Brazil wood, See also:Nicaragua or See also:Peach wood, See also:Pernambuco wood and See also:Lima wood, each of which has a different commercialvalue, although the tinctorialprincipletheyyield is similar. Commercial Brazil wood is imported for the use of dyers in billets of large See also:size, and is a dense compact wood of a reddish See also:brown See also:colour, rather See also:bright when freshly cut, but becoming dull on exposure. The colouring-See also:matter of Brazil wood, brazilin, C16H1405, crystallizes with 12 See also:H2O, and is freely soluble in See also:water; it is extracted for use by See also:simple infusion or decoction of the coarsely-powdered wood. When freshly prepared the See also:extract is of a yellowish tint; but by contact with the See also:air, or the addition of an alkaline See also:solution, it develops a See also:brick-red colour. This is due to the formation of brazilein, C16H1205•H2O, which is the colouring matter used by the See also:dyer. Brazilin crystallizes in hexagonal See also:amber yellow crystals, which are soluble in water and See also:alcohol. The solution when See also:free of See also:oxygen is colourless, but on the See also:access of air it assumes first a yellow and thereafter a reddish yellow colour. With soda-ley it takes a brilliant deep See also:carmine tint, which colour may be discharged by See also:heating in a closed See also:vessel with See also:zinc dust, in which See also:condition the solution is excessively sensitive to oxygen, the slightest exposure to air immediately giving a deep carmine. With See also:tin mordants Brazil wood gives brilliant but fugitive See also:steam reds in See also:calico-See also:printing; but on See also:account of the loose nature of its dyes it is seldom used except as an See also:adjunct to other See also:colours. It is used to See also:form lakes which are employed in tinting papers, staining See also:paper-hangings, and for various other decorative purposes.

End of Article: BRAZIL WOOD

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