Filling time shouldn't be an issue with Paterson tanks. I did 8 rolls at once in one of their tanks two days ago, and got the 2.5 liters of developer completely poured in within about 12 seconds. A sharp line of density change certainly sounds like not enough developer in the tank (unless, of course, the lighter density section was at the bottom of the tank, in which case I haven't a clue as to cause.)(posted 8625 days ago)I'm curious, though, as to how you put the film in the tank. Did you just roll it up, emulsion side in, and let it expand against the sides of the tank, or did you manage to cobble together two reel halves to hold it in a spiral? I'm thinking of doing some 4x5 sheets (for the first time in decades) and would like to take advantage of the rapid fill and iversion agitation possibilities of my Paterson tanks, but haven't figured out yet how to put the film in the tank.
Cheers,