Archived posting to the Leica Users Group, 2000/06/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Tina: I know you have received a number of suggestions from other Leica detectives, so may be one more might help. A short while ago I found a batch of T-max 400 film was fogged on the top edge. This film was hand processed in Jobo tanks just as were Agfapan 25 and 64 rolls which had no such fogging. With the help of Jobo, we found that one of the Jobo tank tops had a hairline crack that emitted enough light to sensitize the T-max 400, but not the slower Agfapan films. Found the offending top, replaced it and the problem disappeared. I can conceive that a similar crack, possibly in the body of the tank, could emit enough light to fog the film located on the outside of the reel, which would be in the area of 4 to 5 frames. Hercule Poirot signing off. Bob Stack