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Aluminium mordants used with brazilin produce the standard red colors, while the use of a tin mordant, in the form of SnCl 2 or SnCl 4 added to the extract is capable of yielding a pink color. An alternative preparation which produces a transparent red color involves soaking the brazilwood powder in glair or a solution of gum arabic. Alum is ...
It is used for fine leather tanning and imparts a red-brown color. Ordinary or warm soluble quebracho (also known as insoluble Quebracho) is the natural extract obtained directly from the quebracho wood. This type of extract is rich in condensed tannins of natural high molecular weight (phlobaphenes), which are not easily soluble. Its use is ...
Carmine (/ ˈ k ɑːr m ə n, ˈ k ɑːr m aɪ n /) – also called cochineal (when it is extracted from the cochineal insect), cochineal extract, crimson lake, or carmine lake – is a pigment of a bright-red color obtained from the aluminium complex derived from carminic acid. [2] Specific code names for the pigment include natural red 4, C.I ...
Paubrasilia echinata is a species of flowering plant in the legume family, Fabaceae, that is endemic to the Atlantic Forest of Brazil. [4] [5] It is a Brazilian timber tree commonly known as Pernambuco wood or brazilwood [6] (Portuguese: pau-de-pernambuco, pau-brasil; [6] Tupi: ybyrapytanga [7]) and is the national tree of Brazil. [5]
NCSU Inside Wood project; Reproduction of The American Woods: exhibited by actual specimens and with copious explanatory text by Romeyn B. Hough; US Forest Products Laboratory, "Characteristics and Availability of Commercially Important Wood" from the Wood Handbook Archived 2021-01-18 at the Wayback Machine PDF 916K; International Wood ...
The crown is conical, becoming a narrow rounded dome with age. The bark is thick and gray-brown at the base of the tree, but thin, flaky and bright orange-red in the upper crown; the tree's name derives from this distinctive character. Some red color may be seen in the fissures of the bark.
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