Why is dicyanin dye banned? Because you really could see peoples auras with it.. There is multiple newspaper articles talking about aura classes made from Dicyanin dye, talking about how to tell if someone is sick by what colour or how strong their aura is. These are easily searched, just type in dicyanin dye and aura on any public site where you are able to search newspaper articles.There are quite a few from 1919 talking about Aura glasses. Why would they have wrote about it, if it wasn’t true