... one of metal print machine: It not only engraves copperplate, and steel board, but also colored the engraved print. It could be ... a various of bright, gold, red, green, blue, yellow, black and white color, etc. It fits for all industries of metal surface treatment ... metal surface. It suitable for solder of two stainless steels together, polishing the angle and the burrs of mould, increases the surface ...