Sun Chemical announced price increases of 3 to 7 percent on all packaging inks and coatings, that were effective Oct. 1, according to Richard Pettifor, Sun Chemical corporate vice president and president, North American packaging inks. These increases include all inks and coatings for flexible, folding carton and paper packaging sold in the U.S., Canada and Mexico.      “Petrochemicals are the key ingredients in many of our products, and there has been a steady rise in the cost of all our raw ...