Gambir Extract（rossonl@huacheng-biotech.com）

Product: Gambier-extract
Botanical name: Uncaria gambier
Tanning classification
Pyrocatechin tanning material (Phlobaphen former)
Specification (all values according to the filter method)
powder
catechins content: 20%
insolubles % 12.0
humidity % 12.0
dry matters % -
non tanning content % 17.0
Density (?B? -
pH (6.9?B? 4.6 0.3
ash % 4.5
Description
Gambir extract is a tanning agent extracted from the leaves of the Uncaria Gambir plant, which comes from Asia and only grows approximately 10?north or south of the equator line. The plant, which grows as a wild bush, can also be cultivated. The Gambir extract is won from the leaves, partly without the branches by extraction with water at a temperature of 85-90 and evaporation. The powder is then made by the spray-dry method.

Application
By using Gambir extract only, a very soft leather can be obtained, particularly in the re-tanning of calf-leather. However, Gambir extract is also used for the re-tanning of chrome-tanned glove leather, with a remarkable fullness of the leather as well as softness and elasticity.