Dope Dyed Black 40s/2 Polyester Spun Yarn Exporting to Egypt,Turkey,Tunisia 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