UMITAN DS / NN liq. is a dispersant penetrating liquid, easily dissolves in hot and cold water, recommended for the dyeing of leather is chrome and vegetable, both in the presence of acid dyes, which in the presence of basic dyes used as comeback.

In the specific case of semi-chrome tanning is an advantageous use because the chrome tanned leather and retanned with UMITAN DS / NN does not lose its unique characteristics, as opposed to when you make a re-tanning with vegetable tannins, also made the comeback with basic dyes give a dye deeper and more vibrant.