CHESTNUT EXTRACT is a natural tannin extract prepared from chestnut (Castanea sativa Mill.) wood.
Main constituents : hydrolysable tannins > 75 %.
Natural dye and textile printing : this plant extract allows to dye any type of mordanted fibers. Beige, brown shades according to the formula. Grey in the presence of iron.
Other uses : tannery
The plant :
The chestnut tree can reach 25 to 30 m in height. This is a spontaneous species around the Mediterranean sea. It is also cultivated in all temperate Europe, in Northwestern Africa, in the Middle-East and in Northern America.
The large-scale use of chestnut tannin arose only at the end of the XIXth Century while appeared processes for black dyeing of silk and its use in tannery. The coloring principle, which gave a dark reddish shade to skins, was then separated from the tannin extract.
An overexploitation of the resources and diseases severely affected both European and American chestnut groves that have considerably reduced today.