If you're transferring coins directly to another SR account you can send it directly to the name of the other account. BTC transferred that way are not mixed etc., but are instead simply 'moved' within the Silk Road internal wallet. If you use the 'withdraw' function, then the Bitcoin should be tumbled but I'm not 100% sure on this. If you're really concerned about it you may want to withdraw your BTC, send it through a tumbler such as BitcoinFog, and then send it to the other SR account deposit address. Libertas