Stop Bath.. How important?

Discussion in 'B&W: Film, Paper, Chemistry' started by SchwinnParamount, Sep 7, 2005.

  1. Sirius Glass

    Sirius Glass Subscriber

    Messages:
    27,521
    Joined:
    Jan 18, 2007
    Location:
    Southern California
    Shooter:
    Multi Format
    Groups:
    The only time I remove film from reels is if I am using Jobo reels.
     
  2. Ronald Moravec

    Ronald Moravec Member

    Messages:
    1,359
    Joined:
    Jan 17, 2005
    Location:
    Downers Grov
    Every time I did immersion slowly with hangars, I would get trails of undeveloped area from hangar hole area on the bottom. Slower the immersion, worse the problem. Smash it down in less than 2 sec, problem goes away never to return.
    I special ordered a hangar rack from Arkay. Six or 8 hangars fit and film does not touch. Only one handle to deal with. Again smash it down.
     
  3. jnanian

    jnanian Advertiser Advertiser

    Messages:
    24,838
    Joined:
    Jun 21, 2003
    Location:
    paswonquitte
    Shooter:
    Multi Format
    unorthodox is good :smile:
    i'm glad to read you solved your problem !
     
  4. jonw

    jonw Member

    Messages:
    469
    Joined:
    Aug 13, 2004
    Location:
    Boise, Idaho
    Shooter:
    Multi Format
    Why hot water? Does it remove the "photoflo" faster and more completely than cold water?
     
  5. MattKing

    MattKing Subscriber

    Messages:
    23,162
    Joined:
    Apr 24, 2005
    Location:
    Delta, BC, Canada
    Shooter:
    Multi Format
    Hot water removes any residue of gelatin faster and more completely - maybe photoflo as well.
     
  6. Gerald C Koch

    Gerald C Koch Member

    Messages:
    8,262
    Joined:
    Jul 12, 2010
    Location:
    Southern USA
    Shooter:
    Multi Format
    Hot water is better at cleaning the reels. Periodically I will give the reels an overnight soak in a weak sodium carbonate solution and then a brief rinse.
     
  7. Vaughn

    Vaughn Subscriber

    Messages:
    6,165
    Joined:
    Dec 13, 2006
    Location:
    Humboldt Co.
    Shooter:
    8x10 Format
    I do not soak my film in PhotoFlo while on the reels. I am too lazy to wash the reels that well. And I love see-sawing my film thru a bowl of PhotoFlo -- for no better reason than I've been doing it that way since '77.
     
    Last edited: Jan 8, 2017
  8. Sirius Glass

    Sirius Glass Subscriber

    Messages:
    27,521
    Joined:
    Jan 18, 2007
    Location:
    Southern California
    Shooter:
    Multi Format
    Groups:
    Once I started using a Jobo processor I put PhotoFlo in a plastic bowl and put roll film loosely wound or sheet film into the bowl and slowly move it around for a couple of minutes since Jobo publishes not to put their reels in PhotoFlo.
     
  9. Petraio Prime

    Petraio Prime Member

    Messages:
    177
    Joined:
    May 17, 2009
    Shooter:
    35mm
    Do you fill the tank almost completely, every time, regardless of the number of rolls? Do you fill the tank with an empty reel if you have only one roll to process?
     
  10. bdial

    bdial Subscriber

    Messages:
    6,257
    Joined:
    Jan 2, 2005
    Location:
    North East U.S.
    Shooter:
    Multi Format
    Yes to both
     
  11. John M Austin

    John M Austin Member

    Messages:
    1
    Joined:
    Aug 26, 2018
    Location:
    University Place, WA
    Shooter:
    DSLR
    bump - Can the stop bath be any sort of acid solution as long as it is approximately the same ph as "standard" stop bath?
     
  12. Anon Ymous

    Anon Ymous Member

    Messages:
    2,082
    Joined:
    Feb 7, 2008
    Location:
    Greece
    Shooter:
    35mm
    Groups:
    Probably yes, but not all acid solutions have the same buffering capacity, in other words the ability to keep their pH relatively stable after use. Acetic and citric acid have good characteristics in this regard, they are cheap and quite safe to use. Overall, they are the typical choices for good reasons.
     
  13. Ian Grant

    Ian Grant Subscriber

    Messages:
    19,911
    Joined:
    Aug 2, 2004
    Location:
    West Midland
    Shooter:
    Multi Format
    In theory it could, a weak Sulphuric acid stop bath was used in some B&W reversal processes but the following step the reversal bleach also contained Sulphuric acid. I definitely wouldn't recommend using Sulphuric acid though.

    In practice the cheapest and most readily available acids are Acetic Acid and Citric acid you can get white (clear) distilled vinegar in any food supermarket and citric acid in some stores as well.

    Ian
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies. If you have a Photrio account, please log in (and select 'stay logged in') to prevent recurrence of this notice.