Trusted since 1945, Presman Mastermelt has grown from humble Hatton Garden beginnings to a leading, global, precious metal refiner, with sites in the UK, USA and SE Asia. Always fast, reliable and transparent, Presman Mastermelt is the UK jewellery trade’s preferred processor of bench lemel and every kind of workshop waste. It is ISO accredited and is independently audited to ensure consistently high levels of service and environmental compliance.