Given the top/bottom difference and the fact that both rolls were the same type, my suspicion falls on your rinse/wash procedure. If you rinse and wash film by filling the tank with water and then dumping it, the bottom roll will get more wet time during rinses/washes. This could be just enough of a difference to wash the visible dyes out of the bottom roll but not the top roll. In the future, you might want to consider extending your rinse/wash times and/or juggling which reel is top and which is bottom midway through your rinse/wash cycles. |