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  1. 27th February 2018, 10:32 PM #1
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    mulch
    mulch is offline New Member
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    Default I need YOUR help!

    Hi all,

    I'm perplexed as to how this glass insert is held while the piece is inverted. I assume it is glued? I am currently working on a similar
    project and can't seem to understand how this is glued (if this is the case) without any fogging or marks on the glass.

    Attached image is Greg Klassens work.

    Cheers,

    Mulch

    _DSC1351.jpg
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  2. 27th February 2018 10:32 PM # ADS
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  3. 27th February 2018, 10:55 PM #2
    BobL
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    clear setting epoxy?
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  4. 28th February 2018, 05:22 AM #3
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    Default

    I agree with Bob L. Clear setting epoxy, or maybe Silastic?

    Regards,

    Rob
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  5. 28th February 2018, 06:22 AM #4
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    To be truly invisible, the clear epoxy needs to have the same refractive index as glass. The stuff that Windscreens O'Brien use to fill chips and cracks in windscreens is one example.

    You can buy DIY windscreen repair kits at AutoPro etc. that presumably contain clear epoxy with the same optical properties.
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  6. 28th February 2018, 08:29 AM #5
    Robson Valley
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    If you watch the windscreen repair being done, they may use a very bright blue light to supply some UV light for rapid polymerization as many dentists do.
    That implies that the medium is methacrylate, not epoxy (which is thermosetting with a different catalyst.)
    Long ago, our greatest nuisance was bubbles. Out-gassing the mix was essential, even if you believe you can't see bubbles.
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  7. 28th February 2018, 02:27 PM #6
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    Default

    Thanks for the help, i'll look into those.

    Thoughts on Araldite ultra clear?
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