A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2018 Sep 21, 14:33 -0700
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?