The Rs 3,850-crore issue of Chemplast will be selling shares in the price band of Rs 530-541 per share. The offer comprises a fresh issue up to Rs 1,300 crore and sale of shares worth up to Rs 2,550 crore by the promoters Sanmar Holdings and Sanmar Engineering Services. Bids can be made for a minimum of 27 shares and in its multiples.