HOUSTON–(BUSINESS WIRE)–Orion Engineered Carbons (NYSE: OEC), a leading global supplier of specialty and high-performance carbon black, announced today that next year the company will invest to convert a reactor line at its plant in Ivanhoe, La., from manufacturing soft carbon black to producing hard carbon black, commonly used in tire treads. “With the continued onshoring of tire production to the U.S., the carbon black supply-demand balance is getting tighter, particularly for hard carbon b