Sustainable retans based on vegetable tannins

Italy headquartered Silvateam has developed a new line of retanning agents based on tannins, such as chestnut, quebracho, tara and gallnuts. They are water soluble, astringent polyphenolic biomolecules which are widely present in the plant kingdom and able to bind to the proteins of raw hides, turning them into durable, pleasant and supple leathers.