evidence: From what little I know and heard of is that "chandi varak" or finely beaten silver foil that is used to layer the Indian sweets is obtained by beating the silver metal in a bag or cushion made of sheep's udder. Whereas the foil itself is just silver and may not have any contact with the animal skin, to achieve the very fine thickness it has to undergo this process, a thorough beating as the blacksmith would beat a piece of hot iron plate to achieve finess. The udder skin or "leather" is strong to withstand the repeated beating without tearing-up. [...] Silver foil's are made with the help of BULL's Intestine .thin silver sheet are bitten under the fresh bull's intestine.it said that the bull's intestine should be always fresh . Nd for the vegetarian people its a bad news.. . [...] However as of 2016, The Food Safety and Standards Authority of India (FSSAI) has banned the use of any material of animal origin in silver leaf (chandi ka varq) manufacturing process. As of present day (Oct 2017), not sure if it is being enforced.