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  1. #11

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    I have found that Soft Scrub does a decent job of getting fixer / developer stains removed.

  2. #12
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    Does the fixer residue hurt anything?

    I suppose if it is that hard to dissolve it shouldn't be a contaminate during processing. I do hate those spots though.
    Jerold Harter MD

  3. #13

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    To Date the Very Latest This Thread

    Quote Originally Posted by RalphLambrecht View Post
    What is the latest opinion on how to remove the hardened
    fixer residue on storage bottles?
    I believe Hydrogen Peroxide will convert the sulfured sulfite
    into sulfate and perhaps sulfur. Sulfite will convert sulfur
    into thiosulfate.

    You've likely both on hand. If you give the two a try be
    careful, there may be side effects. Ammonia and H2O2?
    Warming may be a big help.

    Not a problem for myself. Fresh, a sessions worth at
    time of processing. Dan

  4. #14
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    Quote Originally Posted by jeroldharter View Post
    Does the fixer residue hurt anything?

    I suppose if it is that hard to dissolve it shouldn't be a contaminate during processing. I do hate those spots though.
    It has to go, or I have to replace the bottles. The fixer has settled at the bottom of the bottle and does not come off with water alone. But frequently, small particles come lose when pouring. These particles are hard as rock and can cling to the soft emulsion.

    I've started a test to find out which suggestion works best. I placed several drops of fixer onto a glass plate and will try to remove them once they have dried. For some reason, the drying process seems to take forever. After 12 hours there is no sign of them drying yet.
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  5. #15

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    Hair blower?

  6. #16
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    Quote Originally Posted by DolganoFF View Post
    Hair blower?
    I don't think this will remove the hardened fixer.

    No, no, this is part of the experiment now. I always thought spilled fixer had to be cleaned up immediately, but it looks like there is plenty of time to do so.
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  7. #17
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    Quote Originally Posted by RalphLambrecht View Post
    I used the search engine, but did find the right thread.

    What is the latest opinion on how to remove the hardened fixer residue on storage bottles?

    I tried warm water and also 25% vinegar, but neither worked very well.

    What has worked for you?
    getting new bottles!
    Regards

    Ralph W. Lambrecht
    www.darkroomagic.comrorrlambrec@ymail.com[/URL]
    www.waybeyondmonochrome.com

  8. #18

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    It sounds like what you have is not hardened fixer as this would be soluble in hot water. I would guess that you have elemental sulfur which is insoluble in water. Sulfur will dissolve in a solution of sodium sulfide. What is formed is a soluble polysulfide.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  9. #19

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    I second the get new bottles. They are cheap enough considering how long it lasts.

    .
    Anyone can make a Digital print, but only a photographer can make a photograph.

  10. #20

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    Never, never, NEVER mix potassium permangante with concentrated sulfuric acid. What you get is manganese heptoxide a very powerful oxidizer and unstable compound. I can't believe that there are websites telling people how to make this chemical. A professor at a school I attended accidently made a small amount in a 50 ml beaker. After it exploded no one could find any trace of the beaker. It was literally pulverized. Fortunately no one was injuted as the beaker was in a lab sink which acted as a blast shield.

    One of the first things taught to chemistry students is never mix any chemicals together unless you know what is going to happen. Even then you must use the upmost care.
    Last edited by Gerald C Koch; 12-04-2011 at 08:49 AM. Click to view previous post history.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

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