We are very excited to offer an alternate version of fustic: fustic powder extract.
Fustic (Chlorophora tinctoria or Maclura tinctoria) is a tall tropical hardwood that grows from Mexico to Argentina. Fustic is high in tannic acid, which makes it an ideal cotton dye. 
 
On cotton, it will dye a clear gold and on silk and wool it will dye gold to brown-gold. Fustic also provides a good base for other colors: indigo overdyed with fustic creates an khaki green; combined with madder and cochineal to make oranges; and mixed with logwood or with iron to produce olive greens.
 
 
Use it at 1-10% on the weight of fibre (WOF). Use at 10% for a bright rich gold with a strong exhaust dyebath for additional color. Lower percentages will produce a lemony shade. The high tannin content of this dye will result in a slight color shift toward a golden buff when exposed to direct sunlight.