Unicolor drum and Rodinal

Discussion in 'B&W: Film, Paper, Chemistry' started by FM2N, Mar 29, 2007.

  1. FM2N

    FM2N Member

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    Hello All,
    As of now I have been using HC110 dilution B with Fomapan 100 for 7.5 minutes in my Unicolor drum with motor base and all is working well. I would like to use Rodinal or Calbe R09 and am wondering what would be the minimum amount of stock dev. that I need to process 4-4x5 sheets? I use 300ml at dilution B. I am interested in these developers at high dilution at about 1:100 so I figure 3ml of stock to 300ml of water should work. Is this enough stock to develope the negs correctly? Also I would appreciate any developing times that have worked. I will also be using 5x7 Arista EDU ultra 100.
    Thanks
    Arthur,NYC
     
  2. Jerry Thirsty

    Jerry Thirsty Member

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    The usually quoted minimum is 5ml Rodinal for 80 sq. in. of film. The Unicolor drum will probably hold 500ml without it slopping out the spout.
     
  3. Lee L

    Lee L Member

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    I've been using Rodinal 1:100 (3ml in 300ml) to do single rolls of 35mm film in SS tanks for 30 years. You can overdevelop the films I've tried with this concentration, so it's not exhausting the developer capacity. That film area is about equal to four sheets of 4x5. I think you'll find that many others do the same. You might get faster exhaustion with the developer being oxidized in a rotary drum, but there's one way you can find out for sure. Give it a go.

    Lee