Michael Daly wrote: > > JorgieJ_at_aol.com wrote: > > > Alcohol should not effect Polycarbaonate lenses make by a good lab/optical > > retailer. > > Perhaps, but most folks get their sunglasses from someone other than an > optician and the quality won't match an expensive prescription pair. > Therefore I wouldn't trust the alcohol. > > The lenses that I ruined with alcohol are Nikon NL-4 prescription from one of > the best opticians in the city. Unless you can advise me of why these are > affected but "good" ones won't be, I'll continue to advise folks not to use > alcohol for cleaning. > > Lexan water bottles shouldn't be used for alcohol. The word on that has > been making the rounds in outdoor gear circles for a while now. FWIW, > John Winters told me that GE doesn't warrant Lexan for use in salt water. > None the less, Eddyline makes a polycarbonate kayak (the Carbonlite 2000). Michael, most likely the "alcohol" you used was *denatured with* materials which DO leach or affect the polycarbonate, as pure "grain" alcohol (we call it Everclear around here -- gotta get it from a liquor store) has no denaturants in it, only 5 % water. Re: use of polycarbonate for yaks: because they are not immersed in water all the time, I'd guess their lifetime in normal use exceeds the attention span of the buyer <G>. -- Dave Kruger Astoria, OR chemist *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Sat Aug 14 1999 - 13:11:00 PDT
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