Since 1886, Kansas City-based Tension Corporation has made the envelopes and printed products that carry everything from financial statements to direct-mail campaigns, while also building packaging and automation systems for fulfillment operations. Privately held and now in its fourth generation of family leadership, Tension manufactures billions of envelopes annually and operates across the United States, China and Taiwan. Its long envelope heritage now includes vertically integrated print production and a Lean Sigma approach used across its plants and offices.