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Date:         Wed, 23 Jul 2008 19:59:51 -0700
Reply-To:     M'obeechi <obeechi@RUNBOX.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         M'obeechi <obeechi@RUNBOX.COM>
Subject:      Ceramic Tint --> Two Layers of 30 = ?
Content-Type: text/plain; charset="iso-8859-15"


If you take two layers of ceramic tint in 30 (meaning blocks 70% of light transmission) what is a reasonable expectation, 


a. that the result is ~ 15
      simply additive
b. that the result is ~ 9
      meaning that the first layer blocked 70 and allowed 30 to pass (as in photons), and the second layer 
      blocked 70% of the 30 that passed the first layer, so only 9 (photons) passed, hence ~ 9% film


Huper Optik is the tint under consideration. 30 is their lowest, and they are, arguably, the best, unarguably German
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