Due to a 50-75 percent spike in the raw material costs for the Violet 23 pigment with further increases expected in 2011, Sun Chemical will raise prices for all products containing the pigment by 20 percent in North America, effective Jan. 1, 2011. Two of the key raw materials needed for the production of the Violet 23 pigment, carbazole and chloranil, have faced a significant supply shortage in both China and Germany due to consolidations and increased demand. This imbalance in supply and d...