Chemical for Paper Industry can be used for the treatment debarking water and of green liquor, retention, dewatering, the treatment of statics, the treatment of ultra fines the treatment of water and sludge. The Chemical can be used to increase the speed of board machine and the production rate by improving the dewatering operation at the wet end and therefore improving the drying operation. The Chemical for Paper Industry ensures recovery of fibres using moderately or highly charged cationic polymer.