Silicone

Discussion in 'B&W: Film, Paper, Chemistry' started by Born2Late, Apr 19, 2013.

  1. Born2Late

    Born2Late Subscriber

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    This may be a bit off topic, but I don't see a better forum for it and it is somewhat chemistry related.

    As the years go by, I have more and more trouble using stainless reels. I have gone to using plastic reels. Sometimes the film loads effortlessly, other times there is great resistance. I clean them thoroughly after each use and they are allowed to dry at least a week between use.

    I've wondered if a bit of food grade silicone would reduce the friction, but am afraid it might contaminate everything. I know once applied, it is virtually impossible to remove and it does creep (spread).

    Has anyone tried this or know what the results would be?

    Thanks
     
  2. summicron1

    summicron1 Subscriber

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    i would test -- find some similar plastic, put a bit of silicon on it, see what happens, but i think you will find it makes the situation worse -- the film slides because both it and the plastic are perfectly dry, anything damp/wet tends to make it bind. Even a bit of oil on your fingers, perhaps?

    I've never been fond of plastic reels for this reason -- with long rolls, especially, they just don't work well.
     
  3. fotch

    fotch Member

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    The best of the plastic reels, IMHO, is the Jobo. All plastic must be dry. I only use the Jobo reels, have both the small and large size reels/tanks, when doing color. I prefer quality Stainless Steel and use that for B&W. Nikkor, Kindermann, or the currently made Hewes. You can load them wet however, I never have needed to do this. I use quality film, either Kodak or Ilford, some Fuji.

    I use to have problems when starting out & used cheap no name reels, very hit & miss. Since upgrading as stated above, never any problems.

    I would practice first in daylight then again with eyes shut, with a sacrificial roll, usually off brand freebee or well expired film & would not otherwise use.

    I would encourage you not to give up.
     
  4. Patrick Robert James

    Patrick Robert James Subscriber

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    You answered you own question.

    It is better to clean reels with a soak in dilute bleach in my experience. Bleach will remove any residual gelatin along with any stains. If you use Photoflo, don't let it touch the reels. If the film is sticking you probably have some residue. I use Jobo reels and I literally just push the film on them. If the reels are clean, I never have any problems.
     
  5. HTF III

    HTF III Member

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    I wonder if anybody still manufactures a roll film apron.
     
  6. AgX

    AgX Member

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    As fotch hinted at, there are two types of plastic reels made by several manufacturers:

    -) Paterson style: true ratched system with balls serving as automated wedges

    -) Jobo style: a simple, two reels system with your thumbs holding and releasing the film edges (foolproof with 35mm)




    Silicone oil/grease:

    I got in my workshop, but rather consider it as contaminant...
    I use it in few situations only
    You don't want it on the emulsion.
     
    Last edited by a moderator: Apr 19, 2013
  7. Nikonic

    Nikonic Member

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    The term "creep" is usually applied to the degree to which solid materials deform under long-term, discrete stresses, not the spread of viscous lubricants.

    Ive never heard of this problem with reels. How was your technique using stainless?
     
  8. Born2Late

    Born2Late Subscriber

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    Due to a workplace back injury, pain medication for it and sleep deprivation from the pain, my coordination is shot. Therefore I need the simplicity of the plastic reels. I wish it were otherwise and maybe it will be in the future, but I need a solution for now.
     
  9. ac12

    ac12 Member

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  10. Clay2

    Clay2 Member

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    I have roll film aprons for most sizes but need more. All my darkroom stuff is in storage after a move and need to
    use my Kodak roll film tank which I have with me in temporary darkroom.
    Best regards,
    /Clay
     
  11. Clay2

    Clay2 Member

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    ac12 Thanks for that link!
    Best regards,
    /Clay
     
  12. Born2Late

    Born2Late Subscriber

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  13. AgX

    AgX Member

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  14. MattKing

    MattKing Subscriber

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    Freestyle had aprons on their site until a couple of years ago.
     
  15. rjbuzzclick

    rjbuzzclick Member

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    How about just folding up some wax paper, poking it in the grooves, and sliding it around the reel to make them a little more slippery?
     
  16. fotch

    fotch Member

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    Or, just get a quality reel, practice with a sacrificial roll, and solve the problem forever. :D
     
  17. gleaf

    gleaf Subscriber

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    I guess I missed the reel size/film size accommodation needed? Silicone spreads until it is one molecule thick and is essentially a slick contaminate. Long term it will migrate to lots of places you do not want it to go. Making an adaption for your 'limiting factors' might be a great adaption for others who have desire being thwarted by the same type of 'bedeviling assault' on their life quality. Developed an adapter for a truck driver once who had to hold re-bar with flat straps. Just a special adapter to couple the strap winch to a torque multiplier worked. An apron should be doable in most any suitable plastic film. One off or several. PM me if you chose.