Deltic holds a 50 percent interest in Del-Tin Fiber L.L.C., a joint venture to manufacture and market medium density fiberboard (MDF). The Del-Tin plant is located near El Dorado, Arkansas, and began production in 1998. The plant is designed to have an annual capacity of 150 million square feet (3/4-inch basis), making it one of the largest plants of its type in the world. MDF, which is used primarily in the furniture, flooring, and molding industries, is manufactured from sawmill residuals, such as chips, shavings, and sawdust, held together by an adhesive bond.