YUVI-493 | Light-fastness improver for polyester

Product Information

Yuvi-493 is a UV absorber for Polyester. It reduces the fibre damage due to photo chemical degradation. Yuvi-493 has very good dispersion stability and is therefore particularly suitable in exhaust method of application. Yuvi-493 has no influence on the shade of dyeings.

Key Features & Benefits
Key Features Benefits
UV absorber
Reduces fibre damage
Good dispersion stability and low foaming
Suitable by exhaust method in soft flow, package & jet machine's during dyeing
General Characteristics
Physical appearance
Greenish yellow liquid
Ionic nature Anionic
pH of 1% solution 7 +/- 1
Miscibility Dispersible with water
Compatible with anionic and non-ionic products
Stable to dilute acids and dilute alkalies

1. Exhaust application during polyester dyeing with disperse dyes.

  • Dosage : 2-4%

2. Thermosol pad application

  • Dosage : 10-30 g/l
  • Yuvi-493 can be applied in presence of carrier, however the carrier residues may impair the light fastness properties of fabric.
  • Yuvi-493 sublimates at higher thermosoling temperatures. Pre-lab trials are recommended. Sublimation can be compensated by increasing the dosage of Yuvi-493.


Storage : Store in cool, ventilated shed away from heat and direct sunlight. Storage temperature should not exceed 35 deg C. Close lids firmly to avoid contact with air and moisture.

Shelf Life : 9 months from the date of manufacturing, if stored under controlled conditions.

The above information is given in good faith and is without warranty

Related Products

Product Name Short Description Description
YUVI-CELL UPF improver for cellulose

A highly efficient UV protecting agent for cellulosic fabrics. It exhibits excellent UV absorbing properties. It is durable to home launderings. It can be applied to dyed fabrics with minimum shade change. UPF of 40-50 can be achieved.