May 17, 2011. /Lesprom Network/. Sonoco announced that it would increase the price for all grades of uncoated recycled paperboard by $50 per ton and by 5% to 8% for tubes and cores, effective with shipments beginning June 6, 2011. The price changes are necessary due to higher base raw materials, chemicals, repair materials and freight costs. Sonoco is a global manufacturer of consumer and industrial packaging products and provider of packaging services, with more than 300 operations in 34 countries.