Four types of naval stores are being produced today: gum, steam distilled, destructively distilled, and sulfate. In paper manufacture, the steam, turpentine vapor, and other gases from the pulping digester are passed through a condenser to collect the crude sulfate turpentine. In the pine gum process, the crude product is diluted with about 20 pounds of turpentine per 100 pounds of pine gum. For steam-distilled wood naval stores, the pine stumps from original growth longleaf pines are allowed to remain in the ground at least 25 years after the trees are cut. Turpentine is now used almost exclusively as a chemical raw material. Rosin makes up about 80 percent by weight of the products obtained by the gum and by the steam distilled wood naval stores industries. The color rosin grades range from pale yellow to dark red. Rosin is used in a variety of soaps as well as in paints, varnishes, lacquers, and printing inks.
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