I made my first attempts at c-41 processing 4x5 film this weekend. Need insight as to what my issue is. Using a 2509 Reel in Jobo CPE2 without a lift and the Rollei Digibase chemistry From freestyle. For the most part they seem fine, except that there is a yellow band of trash across each negative which aligns to the water line during the filing of each step. From my first batch. Excessive curves applied to make the streaks more visible. The top of the scene would signify the bottom of the tank given the way I loaded the reel. I had a technical glitch pop up during the presoak, so I emptied the tank and it sat around for 2-3 hours before I started over with another presoak. I also used the tank recommended 270ml. http://www.kpraslowicz.com/wp-content/uploads/2011/12/streaks-1.jpg http://www.kpraslowicz.com/wp-content/uploads/2011/12/streaks-2.jpg From my second batch. 5 minute prebath, and I upped the chemistry to 300ml. Again, it is where the waterline would be when loaded. To the left would indicate the bottom of the tank. http://www.kpraslowicz.com/wp-content/uploads/2011/12/streaks-3.jpg Any ideas? I just bought the tank used. Perhaps I haven't cleaned it well enough and this is just left over contamination from whatever process the previous owner used last?