C-41/E-6 8x10" in Jobo 3004

[LF_rookie_to_be]

Recently I managed to successfully develop 4x5" color in 3010 drum hand-rolled, using 420ml of chemistry. Next up is 8x10 in 3004 drum, but the maximum volume I can use ("cupped" lid) is 450ml. Will it suffice?

[koh303]

You can always use a funner with flex tube to introduce the developer while you are rotating the tank (maybe you will need an extra hand, or a processor with a lift).

I am guessing when you say cupped lid you are reffering to the chemical cup light trap in the lid? those can be replaced with the regular (but blocked) funnel light trap.

Either way i am not sure i see the problem...?

[LF_rookie_to_be]

I am guessing when you say cupped lid you are reffering to the chemical cup light trap in the lid? those can be replaced with the regular (but blocked) funnel light trap.

No, I mean this DIY modification: http://www.largeformatphotography.info/forum/showthread.php?42835-Jobo-drum-question&highlight=jobo+3010

The problem comes from some reports I read about using 3004 drum for 8x10. 3004 was designed for 22x33 cm sheets, so when an 8x10" (20x25 cm) sheet is inserted, I would expect the film to be just slightly more further from the inner tube's wall, almost necessitating more chemicals. The "cupped" lid shown in the thread linked above holds some 460 ml safely. Hopefully that will do for four 8x10 sheets. As to the processor, I wasn't able to find the mythical $75 CPP-2 with the lift and three drums overe here in Central Europe. They go for much, much more.

[LF_rookie_to_be]

Anyone with first-hand experience developing E6 8x10s in 3004?

[LF_rookie_to_be]

Found the answer, or at least partial answer, on a German forum, and figured I might as well share it with everyone on the forum:

"Die 3004 dürfte also wahrscheinlich einfach nur etwas länger sein, aber jedenfalls auch prima mit 20x25 cm funktionieren, der 1 cm Unterschied in der Breite des Formats wird genauso wenig relevant sein wie bei den 9x12-Planfilmen in den Röhren der der 3010, die für 4x5 Inch= 10x12,5 cm konstruiert sind - also auch wieder 1 cm Formatunterschied.

Das wird normalerweise auch nichts rutschen, weil sehr wahrscheinlich nur ein Blatt in eine Röhre kommt - so ist das jedenfalls bei meiner 3006 für 13x18cm.

Nachteil ist schlicht, dass die 3004 wohl etwa 20 % mehr Chemie benötigen wird aufgrund der größeren Tiefe/Länge der Einzelröhren. In der Praxis wird man aber wohl mindestens einen Liter je Bad ansetzen, dann kommt man bei den geringen erforderlichen Füllmengen dieser Drums immer hin. "

Basically, 460 ml should be fine, as it is close to double of the minimum recommended volume.