Jobo 2830 and 8x10 processing

[dbla]

Recently picked up a Jobo 2830 with the intention of processing 8x10. Do you know if I need the cup attachment for the lid or can I just use the center column without any reels in there? And/or does anyone know a source of the plugs you used to be able to get for the funnel lids??

Thanks!

[Fred L]

If you're going to use it on a roller base, there's no need to cap the cog lid. Just use the centre column as you mentioned to keep the tank light tight. If you mean the lid used for inversion, you shld be able to find the Jobo cap and I don't believe you need the post if you have the cup. If I'm reading your post correctly ;)

forgot to mention, that without the cup, there will be light leaks regardless of the lid. You need either the cup, or the attachment that goes into the centre of the post.

[dbla]

If you're going to use it on a roller base, there's no need to cap the cog lid. Just use the centre column as you mentioned to keep the tank light tight. If you mean the lid used for inversion, you shld be able to find the Jobo cap and I don't believe you need the post if you have the cup. If I'm reading your post correctly ;)

forgot to mention, that without the cup, there will be light leaks regardless of the lid. You need either the cup, or the attachment that goes into the centre of the post.

Yes I think that’s what I’m asking. I’m looking to use it to process two 8x10 sheets. If I read what you’re saying correctly then I can just run the center column like normal without any reels? I’d be using it on my CPE2.

[Fred L]

as long as you have the part that goes into the post and acts as a light baffle, or use the cup, either one will work although I believe the trap/funnel will allow a quicker pour vs the cup. Will two sheets fit in the tank ? I use Expert drums to process 5x7 and 8x10 but use tanks for 35 and 120 so I do understand the plumbing involved haha

[dbla]

as long as you have the part that goes into the post and acts as a light baffle, or use the cup, either one will work although I believe the trap/funnel will allow a quicker pour vs the cup. Will two sheets fit in the tank ? I use Expert drums to process 5x7 and 8x10 but use tanks for 35 and 120 so I do understand the plumbing involved haha

They should, yeah. It’s meant for print processing but they “taco” along the sides. I’d get an expert drum but they won’t work on my CPE2.

[Fred L]

They should, yeah. It’s meant for print processing but they “taco” along the sides. I’d get an expert drum but they won’t work on my CPE2.

I use a CPP-2 but I also use it on a Simm roller base (or Beseler or Unicolour). You have to pick up the drum to dump and fill but it's a simple thing and if you don't want to tray process, I can't recommend Expert drums enough. Spendy initial cost but well worth it and u can likely get your money back on resale.

[dbla]

I use a CPP-2 but I also use it on a Simm roller base (or Beseler or Unicolour). You have to pick up the drum to dump and fill but it's a simple thing and if you don't want to tray process, I can't recommend Expert drums enough. Spendy initial cost but well worth it and u can likely get your money back on resale.

Yeah I hear you, sadly I'd need to replace my Jobo as well. That's a possibility for "another time™️" but for now I think this should work.

[wiza26jh]

I think you don't need the plug source. You just need the part to go into the post and act as a lightweight baffle or use a cup.

eggy car (https://eggycarunblocked.com)

[tgtaylor]

Recently picked up a Jobo 2830 with the intention of processing 8x10. Do you know if I need the cup attachment for the lid or can I just use the center column without any reels in there? And/or does anyone know a source of the plugs you used to be able to get for the funnel lids??

Thanks!

You also need a set of print/film separators. These are small cylindrical tubes that slide into the raised ridges on the 2830. Place them a couple of inches from the top and directly across the circumference from each other and slide each sheet between them. You'll hear a distinct "pop" as the edge of the film snaps into place under the clip. Without the clips there is a distinct possibility that the sheets will become displaced during rotation and impede the flow of chemistry across each sheet resulting in uneven development. The clips prevent this from happening. I process 2 sheets of 8x10 film frequently with the 2830 and the clips and have never had a problem. To easily remove the film from the tank fill it with water to "lubricate" the back side of the sheet.

[domaz]

I used to just use tape around the drum edges to prevent the sheets from sliding into each other after I loaded the sheets. It's a finicky process though, the seperators are much better if you can find them.

[Joseph Kashi]

You also need a set of print/film separators. These are small cylindrical tubes that slide into the raised ridges on the 2830. Place them a couple of inches from the top and directly across the circumference from each other and slide each sheet between them. You'll hear a distinct "pop" as the edge of the film snaps into place under the clip. Without the clips there is a distinct possibility that the sheets will become displaced during rotation and impede the flow of chemistry across each sheet resulting in uneven development. The clips prevent this from happening. I process 2 sheets of 8x10 film frequently with the 2830 and the clips and have never had a problem. To easily remove the film from the tank fill it with water to "lubricate" the back side of the sheet.

What about doing single sheets of 11x14 film in a 2840? Would I need clips for any reason, either with CPE 2 or another roller base?

[Lachlan 717]

What about doing single sheets of 11x14 film in a 2840? Would I need clips for any reason, either with CPE 2 or another roller base?

(Warning: extrapolating ahead…)

I use a 28XX tank on the CCP2 processor to do 7x17” sheets. It holds 2 nicely. The sheets fit around the curve and “snap” securely into the areas between ribs. Never had any new pop out with a couple of hundred sheets done this way…

Without ever having touched a piece of 11x14”, I’m wondering whether these, too, would do the same (assuming 2x7”=14”)?

(As a sub note, I am also interested to find out if 8x10” sheets will also work in this tank as there is a 1” gap between the rib I use for 7x17 and the rib diagonally across from the starting rib).

[ic-racer]

I had some issues with the 28xx tanks and certain films, where the back of the film would not get wet during processing. I did come up with a solution that worked for me, but now I usually get out the 3005 drum, even for 2 sheets. That expert drum has yielded perfectly processed negatives, even when accidentally loaded emulsion side out!

https://www.largeformatphotography.info/forum/showthread.php?122184-Marks-when-Using-Jobo-Print-Drums-for-B-amp-W-negatives-Possible-causes-and-solutions

[Lachlan 717]

Agreed with the 3005. Expensive, but unrivalled.

[Joseph Kashi]

I had some issues with the 28xx tanks and certain films, where the back of the film would not get wet during processing. I did come up with a solution that worked for me, but now I usually get out the 3005 drum, even for 2 sheets. That expert drum has yielded perfectly processed negatives, even when accidentally loaded emulsion side out!

https://www.largeformatphotography.info/forum/showthread.php?122184-Marks-when-Using-Jobo-Print-Drums-for-B-amp-W-negatives-Possible-causes-and-solutions

What was your solution to the 28xx drum rear wetting problem ? There is no Expert drum for 11x14 sheet film, so I need to use a 28xx, one 11x14 sheet at a time. Thank you.

[Lachlan 717]

I don’t have wetting issues with 7x17 in 28XX tanks.

I doubt you will, either, should 11x14” fit securely. This is based on the 11x14 sheet going over a rib, whereas 8x10 doesn’t.

[ic-racer]

What was your solution to the 28xx drum rear wetting problem ? There is no Expert drum for 11x14 sheet film, so I need to use a 28xx, one 11x14 sheet at a time. Thank you.

Something with the fixer contacting the back of the film. By fixing outside the drum in a tray, the marks were eliminated.