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    Re: Restoration
    From: Tony Oz
    Date: 2018 Sep 21, 14:33 -0700

    Hello!

    Recently I got a C.-P.-based soviet sextant on a flee-market. Its' mirrors need re-silvering.

    All the info about the process relates to the DIY-astronomers silvering their DIY-mirrors - when they have to intricately polish the reflective surface because it is on top of the glass (rather than under it).

    Will I need the polishing step as well (and should I worry of an excessive silver layer thikness - which is a problem for DIY-astronomers because of the unwanted silver crystalisation)? The reflective layer on a sextant mirror is to be formed "underneath" the optically-flat glass.

    Or should I simply go the the reputable mirror shop for aluminium vacuum-coating?

    Please comment.

    Warm regards,

    Tony

    60°N 30°E

       
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