A "silver soodan plate" (often referred to as a "Soodam Thali" or "Karpooram Plate") is an ornate, traditional tray primarily used in Hindu households for performing aarti (waving camphor). The standout design element is the center mount, which is specifically designed to hold burning camphor (soodan / karpooram). These are usually made of silver either of 80%, 92.5% or 99% purity