Apr 22, 2013 #four I watched a online video by Gold Hog where by they applied ultraviolet light-weight to indicate the gold collecting of their mats, but i believe that they stated which they experienced dipped the gold in some thing to lead to it to glow to start with. https://preciousmetalstrading86396.topbloghub.com/42579279/copyright-ratings-for-precious-metal-firms-can-be-fun-for-anyone