We have been using Fotospeeds gold toner for sometime in our class and I would like to mix my own basic gold toner from scratch. I have checked the label, their website, etc. to determine what is being used in that formula other than water and gold , but it remains a mystery. Anyone have any suggestions for a substitute? I have a wide variety of exotic gold toners available so i don't need information regarding that classification of gold toners. Just the bare bone basic gold toner. Have also checked the Photoformulary but the only other gold toner they list (besides the exotic ones) is a protective one that has a very short shelve life; like none.