The corrugated packaging industry has been hit with a sharp increase in the prices of its principal raw material – kraft paper in the past few days. In the recent turn of events, there has been an increase of INR 5000 per tonne of kraft paper within a very short span of 10 days. The mills say that further increase should be expected in the coming days, said the Federation of Corrugated Box Manufacturers of India (FCBM) in a release.