... liquid that to engraving all metals of stainless stain, titanium board, gold, silver,copper, iron, stannum etc, it ' s a ... strong power, high speed, lower stress, and top quality. It suit for industries of board patternmaking by handset, label electrotyping, exactitude mould ... one of metal print machine: It not only engraves copperplate, and steel board, but also colored the engraved print. It could be ...