An emptying process is the dissolution by means of acids (hydrochloric and nitric) or caustic soda, of the metal core inside precious alloy products, such as chains, or charms.

This dissolution of the metal core takes place in total safety both for the environment and for the operator as B.T.T. Italy’s equipment is enclosed in hood, all outfitted with a vertical opening door and vapour condensation and aspiration system. In this way, the vapours are carried into the fumes scrubber. The front door opening system is equipped with a safety device in compliance with the law.