Faced with continued increases in raw materials and operating costs, Sun Chemical’s Specialty Inks Group will increase prices by 6 to 10 percent on all products sold in North America effective Sept. 1, 2008.   “The printing ink industry continues to experience unprecedented increases in the supply chain of all our raw materials,” said Mike Kellen, director product management, Sun Chemical Specialty Inks. “These increases are directly and indirectly related to crude oil increases as well as la...