Reliance Industries Limited (RIL) has decreased prices of polyester staple fibre (PSF) by Rs. 4 per kg recently. Earlier, it had increased the price of purified terephthalic acid (PTA), monoethylene glycol (MEG) and MELT for this earlier. RIL is the largest manufacturer of PSF and raw material PTA, MEG and MELT in India, so the market follows its prices.