Liese
Member
I was told by a senior Kodak manager that the problem of the backing occurred in transport. Could be heat but also radiation in scanning film in transport. Paper backing image like a watermark. They know of the problem and will replace the film.From previous threads my impression is that the company which makes the backing paper really calls the shots. Kodak and Ilford have managed to get the printing lightened on the paper but little else. What can the user do ? Buy fresh film from a reputable source, keep it cool and use it promptly. The problem seems to be caused by heat. This is certainly plausible as heat would increase the diffusion of chemicals in the ink to the film. Remember that the ink is in direct contact with the film emulsion.