NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Removing/Replacing Sextant Mirrors?
From: hellos
Date: 2006 Jun 6, 13:53 -0400
From: hellos
Date: 2006 Jun 6, 13:53 -0400
"The surface of parchment, also called
sulfurized paper,"
From a cooking definitions page.
I must admit I was baffled by why anyone would want
any kind of sulphur in close proximity to mirrored surfaces, or any metals,
since sulfur tarnishes silver immediately and badly.
In this day and age "genuine" parchment, which is
properly a skin not a paper, is expensive and hard to find. "Parchment paper"
which is a paper grade that is similar to skin, is what you'll get from most
paper merchants. I think I'd rather take a sheet of Tyvek, obtained free of
charge from a CD sleeve, Fedex or USPS mailing envelope, or other source. Tyvek
is a spun-bonded plastic (polyolefin?), soft, clean, impermeable, cheap, with
nothing to emit. It should protect glass very nicely.
Some of the cooking parchments are also waxed or
otherwise impregnated, no need to risk whatever that might be on your
mirror.
