DuBois Chemicals of Sharonville, Ohio, acquired Blue Star Lubrication Technology of Schaumburg, Ill. Blue Star provides industrial lubricants and metalworking fluids that include forming fluids, rust-preventive solutions and straight oils. The company primarily serves the general manufacturing, steel, mining and automotive industries. DuBois provides specialty chemical solutions and services for the manufacturing and transportation industries. The company specializes in the areas of heat-treating salts and quenchants and metalworking lubricants.