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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. Johnoly

    Johnoly Solo Diver

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    Every great public event always ends with 'Fireworks'.

    At the tests conclusion,,,,All the masks that failed should be strapped on to an AL80 filled with explosives and blown up in a safe location ! !
    :m16::gas::yeahbaby:
     
    lowviz and couv like this.
  2. -JD-

    -JD- Eclecticist ScubaBoard Supporter

    # of Dives: 25 - 49
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    Sorry, late to the party here ...

    How about covering the front of the mask with blue painter's tape. That would eliminate the exterior fogging issue. Cheap and easy to replace if necessary and shouldn't be a huge issue to remove the adhesive (if any) left over at the end of testing.

    ETA: If you use strips instead of one huge piece, that may help in giving you visible guide lined for the scrubs, maybe not so good for the burns - I've never tested the heat-resistance of blue tapes ...
     
    lowviz and couv like this.
  3. Rred

    Rred Manta Ray

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    I suppose...One should mention the Mr. Clean Magic Eraser. It is actually a piece of foamed melamine plastic (the stuff they make unbreakable plastic dishes out of) and effectively about a 3000-grit abrasive. The trick is, it is very carefully "foamed" and the foam breaks down as you use it, exposing a freshly abrasive 3000-grit surface all the time.

    If there's crud on the glass, that will scrub it off.
     
  4. lowviz

    lowviz Solo Diver

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    Apologies, all.

    I had hoped to be further ahead with testing today, but @northernone's unplanned detour has taken the wind out of my sails. Donated (Click here to support Find Cameron Donaldson organized by Friends of Northernone) and watching...

    Four masks went through the dishwasher four times, each mask occupied every spot in the upper shelf. 1/4 cup of Cascade (Dawn product, someone called Dawn as a standard in an earlier post.)

    Masks dried with white spots on the glass. * SIGH * Four more times through the dishwasher and super clean water rinse this time.

    No need to mark the dishwasher masks, the logo is almost gone on those masks. Both sets of masks fog exactly the same. HOWEVER, interesting point. cleaning one lens with a paper towel (dry buffing) produces a difference.

    See pic.

    Masks.jpg
     
  5. IncreaseMyT

    IncreaseMyT Banned

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    Did you burn them?
     
  6. lowviz

    lowviz Solo Diver

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    This is just the initial part where the eight masks become two sets of four where one set was dishwasher cleaned and one set remains 'out of the box'.

    I am not ready to speak to the reference side. But soot-flamed, cigar flamed, and toothpaste are all part of the reference lens.

    After that, comes the various treatments on the test lens. The pic above contains my two masks. All suggested testing will be done on identically treated masks.

    -then the plastic ones. I didn't want to wash the plastic masks with the test masks, eliminate any chance of cross-contamination.
     
    Johnoly, divad, couv and 1 other person like this.
  7. Rred

    Rred Manta Ray

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    FWIW, dishwasher detergents are usually a fairly alkaline and harsh cleaner, but a number of them try to include a "spot free" to reduce water spots. That used to mean a separate "Jet Dry" or other liquid dispenser, but even if you're sure you don't have that, sometimes the detergent itself is going to try leaving a film on things.
    FWIW.
     
    chillyinCanada and lowviz like this.
  8. lowviz

    lowviz Solo Diver

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    @Rred: Yes, thanks. Agree. But looking for something that the average person can do without going to extremes.

    You earn a 'leak'. :)

    Tempered glass - Wikipedia

    I never flamed my masks for fear of messing with the tempering. No reason to believe that it would be an issue, but it just didn't seem right to me. I take the fact that I have eight identical NEW masks quite seriously. When will this ever happen again? So, I've been abusing my personal masks to get things right before taking my one-and-only-one shot.

    I now have two really good polarizing filters. Almost ready to report the reference side. This isn't how a study usually goes, (report as you go) but nobody I know has the patience to wait until the end...
     
    Ana, RayfromTX, Johnoly and 1 other person like this.
  9. lowviz

    lowviz Solo Diver

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    Update.

    Reference side treatments are complete. Each treatment was done in three parts and the masks were randomized with the Rand table (A Million Random Digits with 100,000 Normal Deviates - Wikipedia) between each treatment. No way I could keep 8x3x3 treatments in my mind to subconsciously bais any one mask.

    Ronson cigar lighter with Ronson butane:
    75164832
    23674158
    46573281

    Zippo cigarette lighter with Zippo lighter fluid:
    16728345
    53678412
    17234658

    Colgate regular toothpaste, Dremel tool ( 200 series on low speed) with felt pad the size of the outer circle. Weight of tool only as force:
    14825376
    17246835
    41823765

    See pic below. Open dot is cigar lighter 4 seconds x 3. Solid dot is cigarette lighter (soot) 6 seconds x 3. Dot and circle are Colgate Regular, 6 seconds x 3. Cleaned with Dawn and a soft bottle brush to remove the soot. Rinsed with ultrapure water and allowed to dry.

    *** PROBLEM *** Need to construct a quick polariscope that will allow me to take pics. A bit of patience...


    REF.jpg

    Note that a brief exhale (on any of the masks) produces a distinct circular area around the cigar lighter target.

    Cigar.jpg
     
    SleepySlipper likes this.
  10. lowviz

    lowviz Solo Diver

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    Much has been accomplished behind the scenes in the last two days.

    My polarizing filter set is ANCIENT and darkened. New sets are so much better. (Polarizing Filters)

    This is participatory so [Question] do I continue with 'what works' or get a set of 6x6 modern polarizing filters for much better pix? I doubt that the outcome would differ. The outcome (with my filters) is that a cigar lighter alters the glass' tempering.

    However, it appears that the temperature to remove a silicone film (using only heat) is almost exactly the same as the glass 'de-tempering' temperature. Here is the highest temp that any silicone (that I could find) can withstand:
    Item # DSP6038HT-062-36EPC, EXTREME HIGH TEMPERATURE 600F SILICONE SHEETING On Diversified Silicone Products, Inc.
    600F = 316C

    A thought: put a layer of water on the outside lenses while cigar flaming. The tempering is good to 350C. I may try this on one of my masks.

    It is also (unfortunate) that the best way to test de-tempering is to sacrifice a mask. * SIGH * I'm good for it...

    Polarizing Filters.jpg
     

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