Feb 13, 2007. /Lesprom Network/. Sonoco will increase prices for its paper-based tubes and cores and related specialty products by 8 percent in the United States and Canada effective with shipments on or after March 1, 2007, it was announced today by John Colyer, division vice president and general manager, Industrial Products -- North America. "This increase is necessary to counter the effect of recent price increases by producers of uncoated, recycled paperboard. We anticipate additional cost pressures and will continue to monitor them closely," said Colyer.