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  1. #1

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    Don't store XTOL with Dust-Off

    You might be tempted to use Dust-Off (or a clone of it) to drive the oxygen out of a partially used bottle of XTOL. Well, I found the gas dissolves into XTOL and makes the XTOL more active. Here are the curves:

    Click image for larger version. 

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    The bottle was 3/4 full, so only 1/4 was Dust-Off gas. XTOL's pH is unchanged, so Dust-Off is doing something else to the chemistry. And it's probably not what you want. The clone I use says it contains difluoroethane. Rudeofus warned me months ago that this is not inert. I should have heeded his warning.

    Mark Overton

  2. #2
    chriscrawfordphoto's Avatar
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    There used to be a canned gas sold by Beseler and others that was made for this purpose. I think it used nitrogen or CO2.
    Chris Crawford
    Fine Art Photography of Indiana and other places no one else photographs.

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    Fort Wayne, Indiana

  3. #3
    Newt_on_Swings's Avatar
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    Don't store XTOL with Dust-Off

    If you go to a restaurant supply store you can get food grade co2 or better yet food grade nitrogen if it's available. For the co2 they have them in the small metal cartridges (same style as the ones you use in bb guns) that are used for making whipped cream or rapid infusing of herbs and spices in liquids.

  4. #4
    AgX
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    Difluoroethane should be as inert as those banned predecessors used as preservative gas for photochemistries.

    And... what did you use? Dust-Off or a that clone?? I'm puzzled.

    The Content of Dust-Off is stated as a mixture containing 60-100% Difluoroethane.
    Last edited by AgX; 04-02-2013 at 05:20 AM. Click to view previous post history.

  5. #5
    Athiril's Avatar
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    Quote Originally Posted by Newt_on_Swings View Post
    If you go to a restaurant supply store you can get food grade co2 or better yet food grade nitrogen if it's available. For the co2 they have them in the small metal cartridges (same style as the ones you use in bb guns) that are used for making whipped cream or rapid infusing of herbs and spices in liquids.
    Nitrous Oxide is used for making whipped cream. CO2 is for Soda iirc.

  6. #6

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    CO2 is not inert either, at least not for this purpose. It will decrease the PH.

    There is a product called "bloxygen" which is nitrogen and argon gas, it's sold by some paint suppliers and woodworking suppliers for preserving paints and other finishes. It's expensive, but seems to work.

    Another possibility is to search CL for someone selling a nitrogen cylinder.

  7. #7
    paul_c5x4's Avatar
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    You can also get miniature gas bottles for MIG/TIG welding (try your local auto accessory shop). The usual gas is CO2, but pure argon is available.

    One thing to watch for - Whilst the bottles are claimed to be self sealing, they will leak gas slowly, so if you infrequently use one, chances are it will be empty.

  8. #8
    timhenrion's Avatar
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    I use Bloxygen. Its an argon aerosol designed for this purpose (inert gas blanket).

  9. #9
    Bundesphotograph's Avatar
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    I've been using this for years now:

    http://www.freestylephoto.biz/105193...an-Spray-400ml

  10. #10
    EdoNork's Avatar
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    I use butane-propane from rechargable lighters.

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