Fustic
Fustic is a natural dye obtained from the wood of several species of trees belonging to the genus Maclura, primarily Maclura tinctoria, also known as the dyer's mulberry. This tree is native to Central and South America. The wood contains a yellow pigment called morin, which is the primary coloring agent. Fustic has been used for centuries to produce a range of yellow to olive-green colors on various fibers, including wool, silk, and cotton.
The process of extracting the dye involves chipping the wood and then boiling it in water. Mordants,
While fustic is considered a relatively lightfast dye, its washfastness can vary depending on the mordant used