Plates desercated by a Shudra eating off it, or a vessel of the same metal that has been smelt by a cow, or stained by a Brahmana's Gandusha, may be cleansed by the ten purifying substances.
पादजोच्छिष्टकांस्यं यद् गवा ध्रातमथापि वा। गण्डूषोच्छिष्टमपि वा विशुध्येद् दशभिस्तु तत्॥