I just developed two sheets of 4x5 in an 8x10 Unicolor Drum. The sheets were from my only fidelity wood 4x5 film holder. When I pulled the sheets of film out, both looked like they had been over exposed at the flap end by approx 3 stops. There is a distinct, straight line1" from the bottom edge of the sheet, 1/2" beynd the place where the edge of the flap would have been. I examined the holders and dark slides---the flaps, tape hinges and darkslides looked good to me. I could understand if it leaked at the darkslide insertion end on the holder, but ??? I thought it might be uneven development from the Unicolor drum, but I've never had this happen before so I don't think it would be the Unicolor---besides there is a very definite straight line. Any suggestions as to what could have caused it? ---------Thanks!
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