ROCKENZYME ANWA

Wet blue can be treated with Rockenzyme ANWA to level out the differences of the raw material and to improve the evenness and shade intensification of the dyeing. Also, when our wet blue needs extra bating, it is getable by this agent. An acidic bate with Rockenzyme ANWA is particularly recommended for wet blue showing a very compact and irregular fiber structure such as calf or goat skins.
It improves the evenness of the leather due to a better opening up of the fibers. Using of Rockenzyme
ANWA often expands the cuttable area (yield area) to the normally loose belly area. General recommendations for the use of
Rockenzyme ANWA:
Pickled sheepskins: Percentages are based on
pickled weight:
Depickle:
100% Water 30˚C
5% Salt 10’ Be=5
2% Sodium Formate
0.2-0.3% Soda Ash 5’
Add pelts 30’
Drain float
Bate:
50-100% Water 30˚C
1-2% Sodium Formate
0.4-0.5% Rockenzyme ANWA
2% Rockol DGS-100 (nonionic solvent degreasing agent) or Rockol 642 (nonionic degreasing agent)
90-120’ pH=3.5-4
Further processing as usual.
Wet blue goat skins:
Wash:
200% Water 40˚C
0.3% Rockol 642
Drain float
20’
Bate:
150% Water 40˚C
0.5% Rockenzyme ANWA
Overnight on automatic
Drain float
Further processing as usual
pH = 3.5-4
Wet blue calf skins or hides:
Percentages are based on shaved weight:
After rechroming as usual
Neutralization:
150% Water 35˚C
2% Sodium Formate
1-1.5% Neutralization Syntan 60’
0.5-1% Sodium Bicarbonate 3×15’
pH = 5.5
0.5% Rockenzyme ANWA 90’ Drain and washing Further processing as usual