Logwood - the heartwood of the logwood tree, Haematoxylon campechianum, yields deep, rich red purples to orchid blues and was prized as a dyestuff since the 16th century. The logwood tree grows in Mexico, Central America, Dominican Republic, Venezuela, Brazil, the Guyannas, Madagascar, and India. Mixed with iron, logwood gives good blacks a colour difficult to achieve with natural dyes. Logwood has good washfastnes but moderate lightfastness a bit of iron improves the lightfastness dramatically. Logwood chips will give a medium depth of shade at 15-20% wof.