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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Removing/Replacing Sextant Mirrors?
From: Jean-Philippe Planas
Date: 2006 Jun 6, 11:26 -0700
JPP
From: Jean-Philippe Planas
Date: 2006 Jun 6, 11:26 -0700
Yes the "sulfurized paper" is a generic paper name that can be had in the Cooking department of Department Stores. May be the more appropriate English word is waxed paper. I have used this paper type on at least 4 sextants mirrors (first face aluminized high quality mirrors) with success and no induced mirror surface defects and seen the installation process performed by a very experienced Master that used this technique (on a Freiberger sextant).
JPP
Red <hellosailor@VERIZON.NET> wrote:
"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.
JPP
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