roll film tank mechanical agitator - can it be built simply?

Discussion in 'Darkroom Equipment' started by ymc226, Mar 6, 2011.

  1. ymc226

    ymc226 Member

    Messages:
    284
    Joined:
    Oct 13, 2006
    Location:
    New Jersey
    Shooter:
    Medium Format
    Does anyone sell or can one build a simple contraption that can agitate a large Paterson tank (one that can hold either 8 35mm rolls or 5 120 rolls) for development on specified either 30 second or 1 minute schedule. I would time it using a darkroom timer and do the stop, fix and hypoclear manually.

    The reason is I would like to have 3 or more of these tanks develop simultaneously since I often have 50+ rolls to develop at a setting.
     
  2. Rick A

    Rick A Subscriber

    Messages:
    7,441
    Joined:
    Mar 31, 2009
    Location:
    northern Pa.
    Shooter:
    Multi Format
    Um... I think they are called Uniroller motor bases, or something similar. Anyway, they are self reversing and will possibly handle the three roll Patersons, the two rooll tanks dont work so well(at least on mine).
     
  3. MattKing

    MattKing Subscriber

    Messages:
    17,035
    Joined:
    Apr 24, 2005
    Location:
    Delta, BC, Canada
    Shooter:
    Multi Format
    I think the OP may be looking for something that does inversion agitation, not rotary agitation.

    I use the roller bases for rotary agitation of the smaller 2x120 Paterson tanks. For the 5x120 tanks, you would need something to hold the tanks in position, and I would be concerned about whether the tanks + reels + chemistry might be too heavy.
     
  4. Ian Grant

    Ian Grant Subscriber

    Messages:
    18,092
    Joined:
    Aug 2, 2004
    Location:
    West Midland
    Shooter:
    Multi Format
    Yes, they are called hands. I've often had 3 or more large tanks on the go at the same time, all Paterson with inversion agitation.

    When I process that way I always use replenished developer, I stagger the tanks, starting a new cycle every 5-10 minutes, longer (10 mins) when there's more than 2 tanks.

    I've worked that way when needed with both B&W and E6 since the 1970's (late 70's for E6). If it was a constant demand I'd use deep tanks again :D

    Ian
     
  5. Martin Aislabie

    Martin Aislabie Subscriber

    Messages:
    1,416
    Joined:
    Nov 17, 2007
    Location:
    Stratford-up
    Shooter:
    4x5 Format
    Have you thought about a TAS Film Processor - http://www.rhdesigns.co.uk/darkroom/html/tas_film_processor.html

    They are expensive but it could be exactly what you are looking for

    Richard Ross (the man behind RH Designs is an APUG subscriber and all round good bloke) is very freindly and full of good advice if you want or need help

    Martin
     
    Last edited by a moderator: Mar 11, 2011
  6. ymc226

    ymc226 Member

    Messages:
    284
    Joined:
    Oct 13, 2006
    Location:
    New Jersey
    Shooter:
    Medium Format
    Thanks Martin, that's just what I wanted. I emailed Mr. Ross to see if the largest Paterson tank can be accommodated.
     
  7. David A. Goldfarb

    David A. Goldfarb Moderator Staff Member Moderator

    Messages:
    17,978
    Joined:
    Sep 7, 2002
    Location:
    Honolulu, Ha
    Shooter:
    Large Format
    Have you considered setting up a tank line? It's been a while since I've used 3.5 gallon tanks with cages, but they hold a lot of reels (I forget if it's 24, 36 or 48 stainless 35mm reels).