... time in the circumstance of engraving black or white mark on the various of metals by many ... the all metals with bright, gold, red, green, blue, yellow, black and white color, etc. it fit for colored ... forming a various of bright, gold, red, green, blue, yellow, black and white color, etc. It fits for all ... it, it can also color them with gold, red, yellow, blue, black, green, gun color, purple, orange ...