Optical White Polyester Spun Yarn 42/2 Exporting To Turkey,Egypt,Tunisa 100% Polyester Dope Dyed OEKO-TEX 100 Black and Optical White Fiber, Eco-Friendly 1. Good color fastness: color fastness to washing and rubbing is grade 4-5 2. No color difference between different batch: DE value of computer color matching â?¤1.0 3. Resistance to ironing: color fastness to heat and pressure bonding 150 degrees in 30S, 4~5 grades
