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Date:         Sat, 8 Mar 2003 19:24:37 -0600
Reply-To:     John Rodgers <j_rodgers@CHARTER.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Rodgers <j_rodgers@CHARTER.NET>
Subject:      Re: window tint
Comments: To: caryccc <caryccc@juno.com>
Content-Type: text/plain; charset=us-ascii; format=flowed

The recent write up about tint and solar radiation really tells the true story.

John Rodgers 88 GL Driver

caryccc wrote:

>John: >You seem to be very knowledgeable about window tint. I am concerned with >high privacy / high transparancy first, and heat reduction second. (even >though my AC has never worked) I understand why a metal spluttered type of >film is more effective at reflecting heat and / or UV rays than just a >normal tint film. However, I wonder if a darker tint is actually better at >keeping a van cooler temperature-wise than a lighter tint. I suspect that >a darker color would absorb more light rays (and therefore more heat). I >think people may believe darker = better because they associate a dark car >interior with lower temp.; in other words, a false logic of it simply >"looking" cooler. I have asked around at several tint shops, but cannot get >any definitive answers regarding darker actually reducing interior temps. > Years ago, an intelligent person told me that non-tinted windows were >better, because the UV rays that penetrated thru the glass could likewise >exit almost as freely, but that a tinted window (which reflects most but not >all UV rays) ultimately traps more UV (and therefore more heat) inside, >because the UV that enters the car has greater difficulty reflecting back >out of the interior. I like the privacy of a dark tint, but find that I >can't see out at night when I need to back up, park, etc. I have tried to >find the old-fashioned mirror-type tint, which satisfies the day privacy / >night visibiliy issue, but apparently it is no longer for sale in FLAPS. > >I have heard about a window tint test done by a university somewhere in the >Southwest (AZ?): Two identical model cars with the same interior and >exterior color were parked in the sun. One had dark tint, the other light >(or no) tint. After 4-5 hours, both cars supposedly had the same interior >temperature. > Have you or anyone else heard of this experiment? > Has anyone actually measured the interior temperature difference before >and after tinting their windows? > Anybody with tinted and non-tinted windows vans want to try the above >experiment? > Maybe Pop-top versus passenger metal roof? > Any ideas or comments on these issures are appreciated! > >Cary > > > >


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