I have been taken photos with TX400 for a long time in 35 mm, and I am very pleased with it. I work at EI200, with HC110 (E= 1:47), 20ºC, for 6 minutes. When I develop it, I always make a pre-washed of 1 minute with water at the same temperature. Yesterday, I took some photos with TX400, 120 mm, with a Mamiya 645M that a friend of mine lent to me. I decided to work at EI200, since I guess it is the same film that I have been using with my 35 mm camera. However, when I made the pre-washed, I got a blue colour in the water that I had not ever gotten with TX400 35 mm. The final result was satisfactory. The question is: Are TX400 35 mm and TX400 120 mm the same film?