Looking for a 30x40 drum and processor

Discussion in 'Darkroom Equipment' started by stevewillard, Nov 29, 2010.

  1. stevewillard

    stevewillard Member

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    I currently have a 30x40 drum processor made by Photographic Consolidated Industries. It consists of a base unit that rotates the drum back an forth like a JOBO drum processor and a drum that is the size of a small barrel for processing 30 x40 prints. I believe the machine was used by people making cibrachrome prints. The company no longer exists.

    I am looking for a backup one or the 30x40 drum that goes with it. Does anyone know where I can get one or have one they are willing to sell?

    Thanks for any considerations

    -Stephen
     
  2. darkroom_rookie

    darkroom_rookie Member

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    Can't help you with that, I use sewer pipes with original end caps. Never seen one of these processors. Could you post some photos of it? Perhaps someone else might find it interesting too.

    Thanks
    d_rookie
     
  3. Sirius Glass

    Sirius Glass Subscriber

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  4. Bob Carnie

    Bob Carnie Subscriber

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    Steve

    Are you using it for film or print?
    Jobo made 30x40 drums for print.

     
  5. stevewillard

    stevewillard Member

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    Bob, its prints. Are you sure that is not a 30x40 cm print/film size? I am looking for a 30x40 inch print size.
     
  6. darkroom_rookie

    darkroom_rookie Member

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    Here's what I have:

    [​IMG]

    Jobo 4202
    PE pipe - max. 20x24 inches
    PE pipe - max. 33x44 inches

    So far I only did B&W in the two larger drums, as I would probably get uneven development with RA4 process. It works perfect in the 4202 drum, though. I was thinking of making a copy of the Jobo light tight cap with a cup from the end caps of the pipes. Would it work well for larger prints and larger quantities of chemicals?

    d_rookie
     
    Last edited by a moderator: Nov 30, 2010
  7. Bob Carnie

    Bob Carnie Subscriber

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    I am pretty darned sure Jobo makes 30x40 drums for jobo prints, a cibachrome printer in Toronto did it that way.

     
  8. stevewillard

    stevewillard Member

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    Bob, below is the link that Sirius Glass provided me above. Note, that the 4202 drum does a 30x40, but it is in centimeters and not in inches. The size of my 30x40 drum is huge and looks more like a 55 gallon barrel and could never fit into a JOBO processor.

    http://www.apug.org/forums/forum379...202-tanks-simar-roller-agitator-unitimer.html
     
  9. EdSawyer

    EdSawyer Member

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    d_rookie - where do you get pipe and caps like that?

    -Ed
     
  10. darkroom_rookie

    darkroom_rookie Member

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    Pipes were given to me at construction sites. They're made in Croatia, not very far from where I live, but I believe these are common and can be found anywhere in the world. The smaller one is 225 mm in diameter and the larger one 315 mm. Material is HDPE, and the caps, which are original and fit very tightly, are probably PVC.

    d_rookie
     
    Last edited by a moderator: Nov 30, 2010
  11. jeroldharter

    jeroldharter Member

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    If this is a DIY project: 6 inch pipe would not be sufficient for the 30 inch side of the paper. You would need ~6.5 inch diameter tubing which would be hard to find. So you could get 8 inch tubing which will accommodate the 40 inch side and then use a 30+ inch length of it. Not all PVC pipe is light proof from what I understand. If you used 36 inch wallpaper troughs, you could leave one end of the tube open and spin the tubes in the trough under safelight.

    I think the largest Jobo tank is the 3063 for 20x24 inch.
     
  12. jeroldharter

    jeroldharter Member

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  13. Sirius Glass

    Sirius Glass Subscriber

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    The drums I have are for prints only. They should not be used for film.

    Steve
     
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  15. darkroom_rookie

    darkroom_rookie Member

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    You can buy ventilation pipes that are 31 1/2 inches in diameter, made of PP - polypropylene. They're grey, but the wall is 5/8" thick, so should be completely opaque. A 6-foot piece would allow you to process a 72x90" RA4 print, that is if you find a solution for even development.
     
  16. archer

    archer Member

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    I made my own print drum from thin walled 8in. pvc irrigation pipe 40in long. For the paper channels I used 36in pvc blades from a cheap Levelor type blind and for the sealed end, a flat piece of pvc cut to fit and drilled to accept a 2in pvc elbow and on the inside surface a 5in. pvc light and splash baffle. All components were glued using pvc pipe cement. An 8in pvc pipe cap fits the open end and I attached a thick piece of pvc, heated and bent to form a handle for the cap was glued to the cap. The cap is leak proof in use with no gasket necessary. I made paper channels for 16x20, 20x24 and 24x38 in paper. I had to make a roller base for it and it clamps to the counter and all rotation is done by hand. It has worked so well that I use it for all my large prints and when I need to make prints from 50x80 in. or longer, I use troughs made of the same pvc pipe cut in half and legs glued to the troughs made from thick pvc flats or 1in pvc pipe heat bent and formed into a cradle and legs and glued to the troughs. With the troughs the biggest print I can make by my self without help is 50x96in. Because the PVC is white, it is not light proof so processing must take place under safelight. I will try to get some pictures of the tube and post them if anyone is interested. I have posted pictures of my mural troughs before so a search should locate them if you are interested. Incidentally, I can process two 16x20 prints in the drum at the same time and although 16oz. of chemistry will cover the prints, for safety sake I always use a liter just to be safe and it will still have enough capacity for two more 16x20's before exhaustion. All the above information refers to color prints. Black and white chemistry has much more capacity. When printing color prints with such large tubes, NEVER use a prewet to heat the tube as it causes staining and uneven development. If you need to heat a large drum use a hair dryer or other form of dry heat.
    Denise Libby
     
  17. darkroom_rookie

    darkroom_rookie Member

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    Denise, I'd be very interested to see some pictures of the print drum you described at the beginning of your post. Thanks.
     
  18. michaelbsc

    michaelbsc Member

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    ABS pipe also comes in 8in diameter, and that should be totally light proof. Making a light trap might be troublesome, but is certainly possible. Just use on of the Unicolor tube as a template.
     
  19. jon.oman

    jon.oman Member

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    I second that!
     
  20. archer

    archer Member

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    Here are some pictures of the drum I made from PVC. The size limit on the lid says 24x32 but most often I make 24x38in as the drum easily accommodates that size also notice the home made roller. PVC rollers cut from 1/4 in stock and bushed with 1/4 brass bushing. Works like a charm.
    Denise Libby
     

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  21. darkroom_rookie

    darkroom_rookie Member

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    That looks great! So the baffle prevents any splashing of the chemicals before the rotation begins. Kind of like the Unicolor drum, just bigger. Is the upper position of the elbow at the sealed end tangential to the gap between the blades/paper channels?
     
  22. archer

    archer Member

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    dark room rookie;
    yes it is and the messy looking silicon sealant prevents turbulence from the paper channels. It was a learn by doing process and the drum works well for both black and white or color. I couldn't find any ABS tubing less than 1/4 in thick and that was just too heavy for me and the ABS caps fit very tight and were hard to remove and they still leaked, so I used PVC and develop under safelight which poses no hardship and the PVC cap fits more precisely and does not leak. The PVC tubing is also available in 10in and 12in and would make tubes capable of print widths of 30 and 40 inch and more.
    Denise Libby
     
  23. darkroom_rookie

    darkroom_rookie Member

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    Denise,
    Thanks for the explanation and the pics, quite instructive and helpful. The caps I have also do not leak, but are a bit hard to remove. Do you think the Jobo-style cup or a similar one in Cibachrome drums is less effective for the even development of a 33x44" colour print?

    d_rookie
     
  24. jon.oman

    jon.oman Member

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    That is a great solution!
     
  25. archer

    archer Member

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    darkroom_rookie;
    I have never used either of those systems so can't give you an informed answer but I can tell you that the secret to even development of color prints is consistent agitation and speed in filling and emptying the chemistry. As to agitation, one complete revolution every 1 1/2 to 2 sec is sufficient and allows you to rotate in both directions. The large 2in elbow allows filling and draining the tank in less than 5sec for either action. You said that your cap was difficult to remove and I found that true even with the PVC cap if I pushed it all the way on so I put a piece of tape around the tube at the point where no leaks occurred and yet still allowed easy removal. Just remember NEVER pre wet the print to temper the tube as it will cause staining and uneven development.
    Denise Libby
     
  26. Allen Friday

    Allen Friday Member

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    I have been looking for tubes or drums also. I plan to develop film and paper, up to 50 x 65.5. I may have found a solution. Tonight I stumbled on the ceme-tube HDPE plastic concrete forming tubes. They come in 4 foot lengths and in diameters of 8, 10, 12, 18, 24 and 30 inches. Google "ceme-tubes" for information. There is even a video on Youtube showing how they connect. They have optional caps which look like they will fit one end of the tube. According to the web site, the tubes can be cut to length using regular power tools.

    I plan on ordering one with a couple of caps to experiment with. I was hoping to attach a Ilfochrome light trap to one of the caps for adding chemicals to the tube without having to remove the cap in between chemicals. White Cap construction supply lists the tubes for sale on their website--and they have locations near me.

    I assume they are light tight, but I'll check this once I have the tubes.

    The smaller tubes look like they would work for your situation.