Rockwood acquires Hamburger Color.

Rockwood Pigments NA, Inc., Beltsville, MD, a subsidiary of Rockwood Specialties Group, Inc., Princeton, NJ, has acquired the business, assets, plant, and equipment of Hamburger Color Company, King of Prussia, PA. Terms of the acquisition were not disclosed.

Involved in coloring concrete for over 30 years, Hamburger Color pioneered the development of liquid iron oxide color suspensions and technologies used to enhance concrete appearance. According to Ronald Rapaport, managing director of the Rockwood Pigments Division, "Hamburger is a highly respected name in concrete colors and has a number of niche products. The Hamburger operation will serve as our key Eastern U.S.-based liquids manufacturing facility, helping up to better serve the concrete and landscape markets with additional products and technical support. The business will be managed by Carlton Johnson, president of Rockwood Pigments NA, Inc." Upon closing, Jack Dunnous, president and founder of Hamburger Color, will retire from an active role in the business.