How to use the jobo 2830 drum

[joho]

for daylight developing 4x5 -5x7-8x10 films and paperers + 24x30.

has anyone used this ?? how do I load it ???

basically it uses 100ml ???

need some help !!!

thanks...

 

[grahamp]

If you are using it like a print drum, the film goes against the outside of the drum, emulsion towards the center.

1. You must have a cup lid.

2. The film is loaded emulsion inwards.

3. There are a set of ribs inside. One rib is common, and you load the sheets out clockwise and anti-clockwise from that.

4. One edge of the film goes against the common rib, and then the other edge is gently pressed inside the appropriate edge for the film format. I do it by running a (dry) finger down the edge, pushing the film inside the rib.

5. 100ml is the minimum for a print by rotation. You have to use at least the minimum chemicals for that format of film and number of sheets. eg. 2 8x10 sheets is the same as 2 rolls of film, so you probably want 500-600ml. If you are using a Jobo there is a liquid maximum for the machine (motor strength). make sure the drum is level for rotation.

6. How are you rotating it? A 2800 series suggests you have a cog lid? By hand, Jobo, ?

7. There are reels for various sheet sizes. I do 8x10 in drums like this, but 4x5 I do using 2509n reels.

8. Stacking smaller sheets can be done - slide the first one right to the bottom, and put the next one above it.

9. Expect to clear the film anti-halation backing is a final rinse outside the drum.

There are Jobo manuals around - try Jobo or Catlabs. It's what search engines are for...

Drums are really designed for prints. While they will work for negatives, there are other, arguably better options. But I use a 2830 drum for my 8x10 film on a CPE2+.

 

[Sirius Glass]

If you are using it like a print drum, the film goes against the outside of the drum, emulsion towards the center.

1. You must have a cup lid.

2. The film is loaded emulsion inwards.

3. There are a set of ribs inside. One rib is common, and you load the sheets out clockwise and anti-clockwise from that.

4. One edge of the film goes against the common rib, and then the other edge is gently pressed inside the appropriate edge for the film format. I do it by running a (dry) finger down the edge, pushing the film inside the rib.

5. 100ml is the minimum for a print by rotation. You have to use at least the minimum chemicals for that format of film and number of sheets. eg. 2 8x10 sheets is the same as 2 rolls of film, so you probably want 500-600ml. If you are using a Jobo there is a liquid maximum for the machine (motor strength). make sure the drum is level for rotation.

6. How are you rotating it? A 2800 series suggests you have a cog lid? By hand, Jobo, ?

7. There are reels for various sheet sizes. I do 8x10 in drums like this, but 4x5 I do using 2509n reels.

8. Stacking smaller sheets can be done - slide the first one right to the bottom, and put the next one above it.

9. Expect to clear the film anti-halation backing is a final rinse outside the drum.

There are Jobo manuals around - try Jobo or Catlabs. It's what search engines are for...

Drums are really designed for prints. While they will work for negatives, there are other, arguably better options. But I use a 2830 drum for my 8x10 film on a CPE2+.

I use the P speed with my Job 3010 Expert Drum on the Jobo CPP processor.

 

[joho]

grahamp@ thank you!
I am looking to buy one [2830] with the cup lid -- all work by hand--

it is for the paper negs , 8x10 and 24x30 daylight lab work.

 

[grahamp]

If you are working with paper, then you should have no real problems. Make sure the drum is level, whether you are rolling it on the bench or on manual rollers. Base the volume of chemistry on the capacity (print area in the drum), but do not go below the drum minimum.

 

[benderscameracorner]

6. How are you rotating it? A 2800 series suggests you have a cog lid? By hand, Jobo, ?

I have a 2840 set up with a magnetic base for use with an old (mid 1980s?) CPE2. It was used primarily for Cibachrome back in the day.
The machine does fit and turn it, though it's possibly the reason why the motor struggles on its higher speed now, heheh.

 

[ic-racer]

Let us know how it goes. I have a bunch of 2800 drums, ends, extensions and lids.

However, I frequently got permanent marks on the back of 8x10 negatives using the 2800 series print drums for negatives. Such that I now use the 3005 drum even if I have only 2 8x10 sheets to process.

Jobo 8x10 Expert drum vs Jobo 2850 for 8x10 negatives.

Kind of a continuation of this thread ( (there was a url link here which no longer exists) ). Here is the deal: A Jobo Expert Drum 3005 cost $500 USD new and will process FIVE sheets of 8x10 negative film. The Jobo 2850 drum can be had for $65 or less on e-bay and will process FOUR sheets of...

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