Heamotoxylum Campechianum

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Heamotoxylum Campechianum
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Heamotoxylum Campechianum is the scientific name of bloodwood or logwood. Logwood is a species of flowering tree in the legume family, Fabaceae, that is native to Southern Mexico and Central America. Its name, bloodwood is a very apt one; it is used as a natural source of dye which produces varieties of violets which is also dependent on the pH value of the solution used. In accidic environments, the dye takes on a reddish colour and in alkaline environments, it takes on more bluish tones. Logwood dyes is used widely on textiles and papers as well as pH indicators. It is also an important source of haemotoxylin which is used in histology for staining. 

The dyeing process begins with soaking and boiling logwood chips for two hours and up to overnight. The chips are then strained before placing the textile/wool into the water. The intensity of the violet colour or other shades can be obtained by adding alum or iron which changes the pH of the water and thus the resulting colour. 

Sample ID: 1273

Particularities

State
Solid
Compound
Selections
Categories
Vegetable
Curiosities
Relationships
Wood | Dye | Colour

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