May 23, 2005. /Lesprom Network/. Sonoco will increase prices on uncoated recycled paperboard by $30 to $40 per ton, depending on grade, effective with shipments on June 13, 2005, it was announced by Marty Pignone, vice president - Paper North America. "We continue to experience rising costs, especially for energy, freight and petroleum-based chemicals. While our continued aggressive productivity and cost reduction initiatives have helped, we cannot continue to absorb these increases," said Pignone. Sonoco, founded in 1899, is a $3.2 billion global manufacturer of industrial and consumer products and provider of packaging services, with approximately 300 operations in 35 countries serving customers in 85 nations.