Nov 04, 2010. /Lesprom Network/. Graphic Packaging International, Inc. (GPI) announced a price increase on all grades of its solid unbleached sulphate (SUS(R)) paperboard in the U.S., effective with shipments on or after December 1, 2010. In line with this increase, the price of all GPI SUS(R) paperboard in Europe will also increase by GBP60 ($97) per ton in the U.K. and Euro 60 per ton in the rest of Europe. Graphic Packaging International, Inc., a subsidiary of Graphic Packaging Holding Company, is a leading provider of paperboard packaging solutions for a wide variety of products to food, beverage and other consumer products companies. The company is one of the largest producers of folding cartons and holds a leading market position in coated-recycled boxboard and specialty bag packaging.