| CI Column Authors 
Andrew Bopp is the associate executive director for the Society of Glass and Ceramic Decorators, based in Washington, D.C. The association represents approximately 800 members who decorate glass and ceramicware and vendors that supply materials and services to decorators.
For more information, call 202-728-4132. 
Ralph Ruark is a registered professional engineer with degrees in ceramic engineering and business, and 26 years of experience in the ceramic industry. He formed Ruark Engineering Inc. nearly three years ago and serves as a technical consultant to two kiln companies. He is dedicated to assisting ceramic companies with a variety of kiln and firing needs. He has organized several training seminars, retrofitted numerous kilns and participated in the specification and procurement of new kilns. Ralph can be reached at (941) 751-1979, fax (941) 751-5739, or e-mail Ruarkeng@aol.com. 
Dr. Charles Semler of Semler Materials Services, is an independent refractories consultant. He is a Fellow of the American Ceramic Society and has served as vice president—international and chairman of the Refractory Ceramics Division. He is a distinguished life member of UNITECR and received the Planje-St. Louis Refractories Award. Dr. Semler can be reached at (520) 577-7752 or fax at (520) 577-3391.
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