1. COMPOSITION

Tanning extract, pyrogallol type, coming from Chestnut Wood.

2. PHYSICAL and CHEMICAL PROPERTIES

Aspect : spraydried powder

Colour : brown

pH (10 % solution) : 3.9 +- 1.0

Total Solids : 93 %

3. CHARACTERISTICS

In comparison with Quebracho and Mimosa, it will be seen that RETAN CHACK has a much lower pH, and this natural acidity imparts to RETAN CHACK its characteristics of giving a high tannin fixation and firmness to leather tanned with it, lower water solubles and a higher resistance to water penetration.

It has a low viscosity, especially when warm, which makes it a valuable component of hot pit liquors.

Differing from the catechol tannins, RETAN CHACK is very stable to the effects of light, as it does not appreciably oxidise in air, and for this reason in addition to the acidic properties already mentioned, is a suitable constituent of heavy leather tannage blends.

4. APPLICATIONS

RETAN CHACK is mainly used in mixture with Quebracho and Mimosa tannins for the manufacture of sole, saddlery and equipment leathers.

In the retannage of hides and skins, we advise to use decolourated RETAN NCL.

Technical Data Sheet

Edition : 16.03.01

Code : ACHACK

Index : 0

Document PC.073/A

This information does not constitute a specification. It is given in good faith
Without guarantee or liability. We are at your disposal for any further technical details.