Interesting/Stupid Experiment I Did
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  1. #1
    Member OneEyeMan's Avatar
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    Interesting/Stupid Experiment I Did

    So, I plopped an ice cube onto the crystal of my T1 for about 30 sec.
    Unsurprisingly, the underside of the crystal fogged up slightly where the ice cube sat, then quickly disappeared.
    Does this mean that the Copper Sulphate capsule isn't doing its job?
    Or was this just an extreme test and the capsule just can't remove 100% of the moisture in the case?
    BTW, the watch runs at about +2 sec/day consistently since I got it.
    Comments??

  2. #2
    Member IAmScott's Avatar
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    Re: Interesting/Stupid Experiment I Did

    Well,

    I certainly wouldn't complain about that accuracy! Nice German piece , that
    certainly appears to be well within COSC standards for higher end Swiss movements as far as I know.
    As to the CS capsule, seems to be working? You did say the moisture appeared to dissipate rapidly?
    Maybe the SINN guys here on the forum, can chime in?

    _Scott

  3. #3
    Member Camguy's Avatar
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    Re: Interesting/Stupid Experiment I Did

    I did the same dumb thing with my EZM13, and got the same result. The copper sulfate capsule is still a very light blue, so I'm not worried.

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  5. #4
    Member cashmonee's Avatar
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    Re: Interesting/Stupid Experiment I Did

    It sounds like it absorbed the moisture as intended.
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  6. #5
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    Re: Interesting/Stupid Experiment I Did

    You are not going to have 100% of the water vapor removed except by expensive industrial processes that wouldn't be used on a watch, nor is the case a perfect, hermetically sealed vacuum. If it was, you wouldn't need the copper sulfate in the first place.

    This seems perfectly normal to me.

    Sent from my SM-G920V using Tapatalk
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  7. #6
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    Re: Interesting/Stupid Experiment I Did

    It sounds like it did its job you just put it to an extreme and it struggled to absorb while the ice cube was on top which doesn't surprise me. You still get some humidity across nos hermetic seals so I would not worry at all.

  8. #7
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    Re: Interesting/Stupid Experiment I Did

    I found a dew point table:

    https://www.lamtec.com/technical-bul...w-point-table/

    Let's assume the ice cube brings the watch case temp down to 32°F/0°C. If the interior temp is 65°F, you will still get condensation even at 30% humidity. For comparison, the annual average humidity in Phoenix, AZ is about 36%.

    ETA: just to clarify some misconceptions in some of the replies above, the ice cube is not introducing moisture to the interior, it is lowering the temperature of the watch crystal. The dew point is the temperature at which water vapor will condense on a surface based on on the atmospheric conditions (in our example, the atmospheric conditions at the interior of a watch case). The copper sulfate reduces the relative humidity inside the case - it does not reduce it to 0%.

    Sent from my SM-G920V using Tapatalk
    Last edited by IndependentGeorge; December 24th, 2019 at 18:29.
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  9. #8
    Member Geof3's Avatar
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    Re: Interesting/Stupid Experiment I Did

    The only watches that are truly humidity free are the Hydros. Impossible to remove all moisture from a watch unless they figure out how to create a vacuum.
    Too many flipped...

  10. #9
    Member sticky's Avatar
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    Re: Interesting/Stupid Experiment I Did

    The ice cube thing was rather extreme so I wouldn’t worry about it.

  11. #10
    Administrator CMSgt Bo's Avatar
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    Re: Interesting/Stupid Experiment I Did

    Quote Originally Posted by Geof3 View Post
    The only watches that are truly humidity free are the Hydros. Impossible to remove all moisture from a watch unless they figure out how to create a vacuum.
    Not a vacuum, but displacement by a moisture free gas: https://www.sinn.de/en/Ar-Dehumidifying_Technology.htm
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