I have a couple rolls of bulk film and the labels are no longer legible, they could be color or they could be B&W. (This is in the color negative catagory as there is no general film catagory.) I also have a few single rolls of 35mm that are identified, and it seems I have an old roll in a processing tank - never processed. So it occured to me that a chart would be usefull to many people as a reference. Does anyone know of a reference of unprocessed film identification based on apperance of film front and back, sproket hole cut, and overall thickness that could help identify unknown films and segregeate them. A method of detecting if the base is triacetate or polyester would also be useful. Mine could be Ilford, Kodak, B&W negative, color negative, or E6 transparency film. Due to the rem-jet backing I can identify old Eastman 5247 film as that is the only soluble backing film I ever purchased. I've searched for such a chart elsewhere and the only thing if found is notch identificataion for sheet film and identifacation of processed film. The goal of all this may be to compile a complete chart based on responces here and in other forums (on my website when I create it), therefore since I intend to give credit where credit is due, please mention your sources if you can give me any clues. I expect this to take some time to collect complete info and I can start by measureing films I know that I have in my posession.