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
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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