One mm wherein the impression is transferred. After engraving the picture is safeguarded by having an close to six µm chrome layer. Utilizing this method the picture will endure for more than 1,000,000 copies in large pace printing presses. Engraving machines which include GUN BOW (among the leading engraving brands) https://xtool-p2-laser86420.topbloghub.com/29615826/details-fiction-and-xtool-p2-laser