daylight print drums

[bunktheory65]

Does anyone have actual diagrams of how they are supposed to work? Was doing some research on the topic today and have hit some huge problems.

IE, so much contradictory information its not funny

 

[btaylor]

They are pretty simple. It’s a dark tube. The end cap comes off and you insert the exposed print emulsion in (in the dark of course) and put the end cap on. The end cap is light tight but contains a cup. While the drum is upright you pour the chemistry into the light trap which flows into the cup. When you tip the drum on its side the chemistry spills onto the print surface and you begin agitation. Then drain at the end of the step and add the next chemical until you get to the end of the sequence. They are made for RC paper, fiber based may not hold its shape well enough when wet. They are very easy and effective to use though a bit slow because of the rinsing and drying required. Sorry I don’t have any diagrams. Maybe there is a YouTube on the subject.

 

[mshchem]

Beseler tubes, which I never used, sat horizontal, there was a big snout on one end, IIRC there was a trough inside that held the liquid until you started rolling it. The Cibachrome design was simple, didn't require a electric roller.
I even had, still have, a stainless steel tube that floated in a water bath, you would roll it with your hand it worked great. Adorama used to sell Doran tubes, super cheap.

 

[mshchem]

Does anyone have actual diagrams of how they are supposed to work? Was doing some research on the topic today and have hit some huge problems.

IE, so much contradictory information its not funny

https://www.photomemorabilia.co.uk/index.html

Look at this site amazing really

 

[Don_ih]

https://www.photomemorabilia.co.uk/index.html

Look at this site amazing really

I've seen that site before - lots of fun stuff there.

 

[Kilgallb]

The 8x10 unicolor tanks work great for 4x5 negative film.

They all eventually leak, but a layer of petroleum jelly applied every two to three cycles will fix that.

I made a roller drum from an old Paterson roll film tank. Does not leak, but it is harder to load.

https://www.photrio.com/forum/threads/my-fix-for-a-leaky-unicolor-drum.173803/

 

[wiltw]

They are pretty simple. It’s a dark tube. The end cap comes off and you insert the exposed print emulsion in (in the dark of course) and put the end cap on. The end cap is light tight but contains a cup. While the drum is upright you pour the chemistry into the light trap which flows into the cup. When you tip the drum on its side the chemistry spills onto the print surface and you begin agitation. Then drain at the end of the step and add the next chemical until you get to the end of the sequence. They are made for RC paper, fiber based may not hold its shape well enough when wet. They are very easy and effective to use though a bit slow because of the rinsing and drying required. Sorry I don’t have any diagrams. Maybe there is a YouTube on the subject.

To the above description, I will add the description for the Jobo tank, meant for use with Jobo processing machines like the CPP-2 or CPA-2:

1. The Jobo tube is opened under darkroom conditions for loading. Larger diameter drums have internial 'ribs' on the interior surface. These ribs allow to you to load four 8x10 sheets into a tube designed to load16x20 paper
2. The baffled light tight top allows you to process in a lighted area, while permitting fluids ot enter/exit.
3. Jobo durms are placed empty (no fluid) horizontally onto the Jobo lift, and fluid is poured into the opening at the top of the lift, which flows into the processing tube while it is rotated by a motor. The processing tube rests on rollers in a shallow tempering waterbath as it rotates.
4. The Jobo lift lever tilts the lift and tank to drain fluid from the tank at the end of each stage of processing.