Industrial salt subjected to electrolysis producing chlorine and caustic soda was the starting point for Kureha's chemical business. Chlorine is the origin of the company's line of specialty products while caustic soda is an essential material for paper and chemical fiber production. In addition, chlorine and caustic soda are intermediate materials used by Kureha to make PPS resin. Because these two products both increase the value of the other, it has been possible for the company to establish an efficient and economical production system that forms the foundations of the whole Kureha business.