M.A. HANNA CO <HNM> TO ACQURE <PMS CONSOLIDATED> M.A. Hanna Co said it has reached definitive agreement to purchase PMS Consolidated, a privately owned manufacturer of colorants for the plastics industry. M.A. Hanna said the purchase, which is subject to certain conditions, is scheduled to close around the end of October. Hanna announced last August that it was in negotiaitons to purchase the company. Headquartered in Somerset, N.J., PMS reported over 70 mln dlrs in revenues in its last fiscal year, which ended May 1987.