Portal celebrated its history Saturday as hundreds enjoyed the 33rd Annual Catface Country Turpentine Festival, and a local forester and turpentine enthusiast says the demand for turpentine may be on the rise again.Portal is known for having one of the last remaining on-site working turpentine stills in the state and celebrates its rich agricultural history each year by firing up the E.C. Carter and Sons Turpentine Still to distill a new batch of turpentine. The Portal Heritage Society, which hosts the festival, sells turpentine produced during the festival year-round, said Doug Chassereau, chief ranger senior with the Bulloch County division of the Georgia Forestry Commission.Recent demand for pure turpentine has increased, and a South Georgia industry has a “niche market” for gum spirits of turpentine, he said.Diamond G Forest Products LLC, located in Patterson, Georgia, provided three barrels of pine gum for this year’s festival, Chassereau said. The demand for pure turpentine as opposed to the product made from paper mill byproducts is growing.The paper mill turpentine has a sulfuric odor, and many consumers want the old-fashioned pure product, he said.