Nov 18, 2010. /Lesprom Network/. RockTenn announces a $40 per ton price increase on Millennium® grades of 100% high strength recycled paperboard. Price increases are effective with shipments on December 20, 2010. RockTenn is one of North America’s leading manufacturers of paperboard, containerboard and consumer and corrugated packaging. The Company operates locations in the United States, Canada, Mexico, Chile and Argentina.