INTRODUCTION
UNIQUE CHA is a modified chestnut extract agent. It is an acid blend of vegetable catequinic – pirogallic. It is an astringency powder product, semi-soluble and good tanning properties.
PROPERTIES
- Supplies leather greenish brown surface colour.
- Fullness and firm grain.
- Increasing weight yield.
- Improving lightfastness.
USAGE
UNIQUE CHA is recommended to be used in last stage of pure vegetable tanning or heavy vegetable retanning processes (30 to 40% of the total vegetable extract offer ). It can be used alone or combined with other vegetable and syntans products. According to the standard to adjust dosage.
TYPICAL ANALYSIS（SHAKE METHOD）
Physical aspect: Pale brown powder
Tannin Agents %: 66± 1.5
None Tannin Agents%: 24±1
Ratio of Tannin and None Tannin Agents: 2.70
Ph: 3.8±0.2
Water Max %: 5.0±0.2
Insolubles %: 3±0.2.%
Ash content: 5±0.2.%
Lovibond Colour (obs): ±0.2
Red: 4.1
Yellow: 13.4
