Sep 10, 2012. /Lesprom Network/. The Board of Directors of KapStone Paper and Packaging Corporation has approved a $29 million investment in the company's North Charleston, SC paper mill. The investment is expected to improve the capability and efficiency of PM3 in producing Ultra High Performance (UPL) lightweight linerboard grades by replacing the press section. The new press section will be supplied by PMT Italia. The investment also includes projects in the fiber and utilities areas to support production of these strategically important grades, as the company said in the press release received by Lesprom Network. Engineering and construction are expected to occur over the next 18 months, targeting installation of the press section during the 1Q 2014. KapStone Paper and Packaging Corporation produces unbleached kraft paper and corrugated products. The Company is the parent company of KapStone Kraft Paper Corporation and KapStone Container Corporation which includes three paper mills and 14 converting plants across the Eastern and Midwestern U.S.