VENTAN NNS is Napthalene based neutralising syntan for chrome tanned leathers, used in leather industry.
Appearance : Light brown coloured powder
% moisture content : 5.0 max.
Solubility : Freely soluble in water.
pH of 10% solution : 7.0 - 8.0
• Due to its low alkalinity, it does not affect chrome complex in neutralising free acidity of leather.
• Due to its composition, it shows good buffering action and ensures safe neutralization giving uniform pH throughout entire cross-section of leather.
• It's use in neutralization of chrome tanned leathers results in lowering of cationic charge of the surface. This facilitates subsequent dyeing and fatliquoring operations.
• It improves the penetration of dyestuffs and do not bleach the colour.
The recommended dosage is 2-3%, on shaved wt., for shoe upper leathers.
The neutralization pH can be adjusted with all other suitable alkalis.
The recommended dosage is 1 - 2% on pelt wt. for basification.
SHELF LIFE :
Minimum 12 months if stored in dry & cool place in closed container under normal conditions.