Aug 23, 2012. /Lesprom Network/. U.S. total printing-writing paper shipments decreased 3% in July 2012 compared to July 2011. Shipments of coated mechanical papers posted the only year-over-year increase among the four major grades. U.S. purchases (demand) of printing-writing papers also decreased by 4% in July, as the American Forest & Paper Association said in the press release received by Lesprom Network. The American Forest & Paper Association is the national trade association of the forest products industry, representing pulp, paper, packaging and wood products manufacturers, and forest landowners.