In December 1993, RockTenn paid $35 million for Les Industries Ling, a Canadian company that used recycled paperboard to make folding cartons. The newly acquired plant, which was to serve as the principal supplier of recycled clay-coated paperboard for RockTenn's Vermont mill, became the company's second largest folding carton facility. A year later, RockTenn agreed to acquire Olympic Packaging, an Illinois-based manufacturer of folding cartons, and Alliance Display and Packaging Co. of Winston-Salem, North Carolina, maker of corrugated displays. The purchases, which boosted RockTenn's acquisitions of manufacturing operations to 17 in a decade, cost about $75 million.