Super high in tannins, this is an extract for dyeing all natural fibers.
Creates brown reds, pinks, browns, golden browns with alum mordant.
Use at 5-10% WOF.
 
This extract has a tannin content of 76% percent. 
Active dye compounds; Flavonoids and fisetin. Red 5.1%. Yellow 5.9%.
Add an alkali to deepen the shades and turn more to reds and pinks. Takes slightly better on cellulose than on protein fibers. 
 
The wood from these trees is some of the very hardest known with a specific gravity of 1.3-1.4.  Extracts are made in factories located near the sources which are in Brazil. The logs are chipped and cooked with steam in copper extractors until the liquor is very concentrated. Some of the common names for this tree are coronillo, quebracho Cornillo (Brazil), quebracho chaqueño, quebracho colorado santiagueño, quebracho macho, and quebracho bolí.
 
Samples in picture; first row 15% ATF second row no mordant third row post mordant FE
 
Super high in tannins, this is an extract for dyeing all natural fibers.
Creates brown reds, pinks, browns, golden browns with alum mordant.
Use at 5-10% WOF.
Cold soluble.
 
This extract comes from a sustainable grower in Brazil; organic, local production, and extraction by-products are used as a source of energy.  The grower is providing nursery production and replanting 500,000 trees/year. Co2 positive footprint.