The CHESTNUT EXTRACT from OCCITANIA is manufactured in the South of France from local resources (regrowth of chestnut trees) and under a virtuous and sustainable approach. The plant tannins (elagic type) are extracted by using the water from wood and from the recycling of extraction condensates, so in closed production without any use of external water, nor waste water production. A VALUABLE CO-VALORIZATION since the wood after extraction is then used for the production of agromaterials for construction.
Main constituents : hydrolysable tannins (elagic type).
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.