View Full Version : JOBO drum for 20x24 film
rich caramadre
15-Dec-2011, 08:30
Which drum would we need to process 20x24 film? I believe we have a CPP unit.
Thanks, Rich
3063
You need more than just the drum. Do a search, i don't know the details.
Greg Blank
15-Dec-2011, 10:50
3063, I can get you one new if you want- if you are the US. Jobo USA at one point made a film blanket insert for ULF sheet film, that would be the other item required.
Someone on the forum provded a link to DYI version, I'll look for the book mark.
I use the 3063 drum for 20x24 negatives. I do not use a film insert. While one is necessary when using pyro/staining developers, I have not needed one when using D-76. The ridges in the tube will leave streaks on the negative when using staining developers. The streaks are not always visible to the eye, but they show up when printing. I have had no problem with streaks when using D-76. I normally develop my big negatives for platinum printing, so I use D-76 1+0 (stock).
Kimberly Anderson
15-Dec-2011, 14:04
I happen to have a mint- specimen for sale right now...
rich caramadre
15-Dec-2011, 14:49
Micheal,
I,m in salt lake also. Let me find out if we need it and I'll get back to you.
Rich
Monty McCutchen
15-Dec-2011, 15:37
I use rollo pyro for my 20 x 24 negs for Pt/Pd printing in the 3063. I don't use the insert and I also don't get the density lines. I used to, but then i was informed to put it on the absolute slowest rotation just barely past turning it on and that took care of the density lines. YMMV but I have found that worked well for me.
Good luck its a great way to take care of big film.
Monty
Greg Blank
15-Dec-2011, 18:42
Thats interesting, I wonder why this happpens. Theories?
I use the 3063 drum for 20x24 negatives. I do not use a film insert. While one is necessary when using pyro/staining developers, I have not needed one when using D-76. The ridges in the tube will leave streaks on the negative when using staining developers. The streaks are not always visible to the eye, but they show up when printing. I have had no problem with streaks when using D-76. I normally develop my big negatives for platinum printing, so I use D-76 1+0 (stock).
Greg Blank
15-Dec-2011, 18:43
Do you single direction or bi-directional rotation?
I use rollo pyro for my 20 x 24 negs for Pt/Pd printing in the 3063. I don't use the insert and I also don't get the density lines. I used to, but then i was informed to put it on the absolute slowest rotation just barely past turning it on and that took care of the density lines. YMMV but I have found that worked well for me.
Good luck its a great way to take care of big film.
Monty
Kimberly Anderson
16-Dec-2011, 07:08
Rich,
Come get it and at least try it out. I'll let you borrow it for a week or so to see if it'll work. Plus it would be fun to meet another LFF geek from SLC.
I live in Riverton out by the new hospital and the In-n-Out burger (like you need an excuse right?)
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