... one of used specific liquid that to engraving all metals of stainless stain, titanium board, gold, silver ... can be plated gold, platinum, rhodium on various metals, for plating gold (24k gold, 18 k gold ... plating, or roll plating, it suit for all noble metals plating industries. 4. Work as one of electrotyping ... colored machine: It can be colored the all metals with bright, gold, red, green, blue, yellow ...