Tannins "Made in Italy"
Tannins obtained from chestnut wood (Castanea sativa), are of a pyrogallol nature and belong to a group of glucosidic tannins which are easily hydrolysable. Chestnut extracts contain a convenient quantity of acid groups and natural organic acids, which determine their considerable astringency and their capability to fix larger scales of the hide.
These properties make chestnut extract especially suitable for the tanning of heavy hides to produce leather soles in particular. It is possible to obtain a leather with high yield in weight, which is compact, firm, flexible and waterproof. The chestnut tanned leathers are elastics, lightfast, resistant to traction and abrasion and have good color.