Sand Casting

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Question

WHAT IS CAST BRONZE?

Answer

Franklin Bronze Plaques uses Copper Development Association Alloy C9220 when manufacturing bronze plaques. This alloy is comprised of Copper (88%), Tin (6%), Zinc (4%) and Lead (2%). We use a sand casting process to complete your order, making molds from a specific sand mixture in which molten metal is poured. Most foundries in the United States use this method, ensuring a durable end product well suited for outdoor use. Cast bronze plaques do not rust when exposed to the elements, but will naturally oxidize over time, rendering a natural patina as seen on older copper objects.