About Knight Jewelry Products

F.E. Knight has been a major part of jewelry casting since the industry's beginnings in the late 1940's. Dr. Ferdinand E. Knight applied the scientific training he had acquired as a medical student in Vienna, Austria before World War II to this new field when he arrived in the United States as an immigrant in 1938. His father, Dr. Leon Knecht, had been a dentist in Vienna and also ran a dental supply house there. During that period the techniques of dental casting, still practiced today, were first developed.

Dr. Ferdinand E. Knight Ferdinand Knight was one of a handful of pioneers who adapted dental casting techniques to the mass production of jewelry by the lost wax casting method. For many decades he was a jewelry designer and contract caster in New York City and one of the small handful of craftsmen during that era who could cast platinum successfully.

The product range was then extended in the 1970’s when F.E. Knight started manufacturing natural rubber products in a variety of convenient sizes and forms. The more modern silicone rubber products were introduced into the range in the 1990’s and are based on man-made products produced by the chemical industry.

The company grew with the casting industry and is currently the world's leading producer of natural jewelry molding rubber products for lost wax casting.

As of the 31st of January 2020 F.E. Knight sold the Silicone Rubber, RTV Rubber and Injection Wax division of the business to Goodwin Refractory Services Ltd (GRS). This sale included the Castaldo brand name and trademarks.

F.E. Knight will continue to manufacture and sell its long-standing range of Castaldo branded Natural Rubber products and associated tools under our new Knight Jewelry Products banner.

Please note that this is now a standalone business entity from Castaldo and orders for Natural Rubber products and associated tools will now need directing to info@knightjewelryproducts.com

Orders for Castaldo Silicone Rubber, RTV Rubber and Injection Wax products are to be as normal to be sent to Castaldo at info@castaldo.com. This domain and part of the business is now operated by Goodwin Refractory Services Ltd.

F.E. Knight shall continue to operate, manufacture and sell the long standing range of high quality natural rubber products and associated consumables at their site in Franklin, MA and are committed to offering their valued customers the same high level of customer service and high quality products as they have done for the past 80 years.

If you would like a copy of our catalogue, or would like to send us a message or ask us a question, please write, call or fax us at:

F.E. Knight Inc.
120 Constitution Boulevard
Franklin, MA 02038 U.S.A.
Phone: 508-520-1666
Fax: 508-298-0160