Caesalpinia paipai

Caesalpinia paipai Ruiz & Pav. is a dye plant used traditionally in Peru, among other places.

Colors
It yields a gray-black colour

Parts used
You must use the pods for this dye.

Methods
According to Raimondi (1900), this is a mud dye, first they boiled the pods, then added the liquid in basins of clay next to the river, and then add the textiles to the basin. The reaction between the tannins in the liquid from the pods and the iron in the clay forms an iron tannate that gives a grey to black colour to clothes.