I have had the need now on several occasions to "bring up" the typed codes and descriptions on original tank stickers. Many times they are vague and I wonder if there are any forensic experts here that may have ideas. I am terrified to use any chemicals on these pieces and wonder if there is any means of photography or other ways of seeing what is there more clearly. I remember seeing a television show where under artificial lighting( possibly UV) two different inks were seen on a forged/altered check. Many thanks, Jim Jordan