... engraving machine is one of used specific liquid that to engraving all metals of stainless stain, titanium board, gold, silver, ... color, no fall off, withstand a high temperature , and anti-organic solvent scours, it fit to cutting bearing, iron and steel industry ... gold, pure silver, etc. with a strong power, high speed, lower stress, and top quality. It suit for industries of board patternmaking by ...