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Anti-Fogging Treatments for New Masks. (a comparison of techniques)

Discussion in 'General Scuba Equipment Discussions' started by lowviz, Feb 23, 2019.

  1. АлександрД

    АлександрД Manta Ray

    # of Dives: 100 - 199
    Location: Moscow, Russia
    797
    1,183
    93
    yes.
    "Chromium mix" based on Potassium dichromate K2Cr2O7
    this mix looks ugly, and very dangerous, but as I know - it is THE best glass cleaning liquid.
    %D0%A5%D1%80%D0%BE%D0%BC%D0%BE%D0%B2%D0%B0%D1%8F_%D1%81%D0%BC%D0%B5%D1%81%D1%8C.jpg
    Important warning: Hexavalent chromium compounds (including chromium trioxide, chromic acids, chromates, chlorochromates) are toxic and carcinogenic.

    One standard recipe involves adding 93 ml of concentrated (95-98%) sulfuric acid to a cooled 7 ml solution of supersaturated K2Cr2O7. If the solution is not cooled, chromium trioxide will precipitate.

    My mother worked in chemical industry and she use this mix very frequently for laboratory glassware cleaning. She told me many years ago about this mix.

    I do not know, how it could react with mask silicone and with plastic (may be just few modern masks use metal inside, or may be even none), and it need to be tesed.

    But if you can fill inner side of mask glasses for day or two, after well washing it should have cleaned surface even better than on the glass crack :)

    here is some info about ChAcid and some antother cleaners Chromic Acid Cleaning Solution(Bruce Hamilton, Alan "Uncle Al" Schwartz)


    and again: Use mask, rubber gloves and do not breath of vapors
     
  2. lowviz

    lowviz Solo Diver ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Northern Delaware or the New Jersey Turnpike
    6,635
    3,240
    113
    Yes, same stuff. We called it "Chromerge". Looks like you can still get it: VWR® Chromerge® Glass Cleaner

    A million years ago, when I was an analytical chemist, we used gallons of the stuff. The world is kinder and greener, now...
     
    АлександрД likes this.
  3. scrane

    scrane Manta Ray

    # of Dives: 500 - 999
    Location: Boise, ID.
    871
    553
    93
    To cure a mask I use toothpaste. If toothpaste doesn't work I flame it. After curing it's baby shampoo before every dive. I hope I didn't miss anything in the previous 250 posts.
     
    couv, agilis and Dan like this.
  4. tridacna

    tridacna ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: New Jersey
    5,707
    2,710
    113
    You ARE the old guard!
     
    lowviz and chillyinCanada like this.
  5. Dan

    Dan Orca

    # of Dives: 500 - 999
    Location: Lake Jackson, Texas
    5,529
    3,083
    113
    I don’t think you miss anything. Don’t fix it if it ain’t broken.
     
    tridacna likes this.
  6. formernuke

    formernuke Barracuda

    # of Dives: 50 - 99
    Location: New England
    423
    170
    43
    Though mine are nice clean and fog free I'm curious as to the results. Mine were a real PITA to clean
     
    lowviz likes this.
  7. lowviz

    lowviz Solo Diver ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Northern Delaware or the New Jersey Turnpike
    6,635
    3,240
    113
    АлександрД likes this.
  8. drrich2

    drrich2 Solo Diver

    # of Dives: 200 - 499
    Location: Southwestern Kentucky
    7,840
    5,001
    113
    Apologies if this has been covered; I've followed this thread over time, but it's been too long for me to recall it all. Anyone used a Mr. Clean Magic Eraser to clean a new mask to 'fight the fog?'

    I first learned of Magic Erasers from a Dive Gear Express article claiming one could clean pencil writing off a slate. It did...very well. Wow.

    Recently, I was struggling with the blinding fog effect of sunlight in the morning on my old car's windshield when the weather's chilly. Sun shining into it turned the 'clear' windshield into a nearly opaque white glare. Online checking indicated plastics in car interiors off-gas when hot (e.g.: green house effect when parked outside during summer) and residue collects on the inner windshield, then when it's chilly atmospheric humidity condenses on it and catches the sunlight...or some such.

    Getting that fog layer off can be very difficult. The Magic Eraser came up as one option, but to be used with some care as it is abrasive (which surprised me; they don't feel abrasive). Gotta said, while it didn't do a great job, it did a decent job, which is more than I can say about anything else I've tried.

    And people deliberately use abrasive toothpaste on new masks.

    Just curious as to how well Magic Erasers work. And on dive slates? They are the bomb!
     
    lowviz likes this.
  9. lowviz

    lowviz Solo Diver ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Northern Delaware or the New Jersey Turnpike
    6,635
    3,240
    113
    I considered it (see post#7) and I'm glad to know others see it as potentially valuable. I will add Magic Erasers to the final tests.

    Still trying to sort all this out and get a good 'second generation' series of tests.
     
  10. scubadada

    scubadada Diver Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Philadelphia and Boynton Beach
    10,763
    6,191
    113
    Lately, I have followed the DGX recommendations. I scrub the lens and the inside of the mask several times with undiluted baby shampoo. I then use a commercial defog, usually Mcnett sea drops as I don't like the gel. I do very well with this regimen, If I get any fogging, I repeat the undiluted baby shampoo wash. So this does not seem to include the abrasive component of cleaning.

    warning-image.png WARNING
    Don't use toothpaste on modern dive masks, especially those masks that have vision correction lenses. You will either damage the lenses, or needlessly waste toothpaste since most modern toothpaste formulations are not at all abrasive. The same goes for using a lighter to 'burn' the lens to prepare a new mask. Dive Gear Express will not warranty masks that have been treated with abrasives or burned with lighters. Most new dive masks do have mold release agents in the flexible skirt that during storage will migrate to the surface of the lens and cause fogging. These deposits can be safely removed with an extra application of a powerful surfactant like baby shampoo, SeaQuick or SeaDrops defog.
     
    drrich2 likes this.

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