I develop a lot of TMAX film in my darkroom. I just shot a roll of 120 TMAX 400 with my Rolleiflex and pushed it to 1600 in exposure and developing which I have done before with no noticeably weird results as follows. In this case there were some areas of bright white where a Kodak stamp showed thru faintly on the prints. It runs vertically and says "KODAK 12" along one side and "KODAK 6" along the other. So it matches the print on the paper backing used as a negative counter on cameras that have the back port. I guess I am getting a reflection through the black side of the paper backing? Is this normal, to have an embedded image on your negatives? Usually you cannot discern it at normal developing but beware, it is there! Perhaps this is real old film where the image bleeds thru the backing over time? (It is a new batch of film that I just ordered but it may have been on a shelf for many years, who knows?) Just wondered if anyone else has ever noticed this.