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Re: [ATM] Borofloat 33

Stathis Kafalis wrote:

>Borofloat 33 is a nice stuff for making mirrors (thermal properties like 
>Pyrex, free of internal stress) and looks very clear, but as of Schott 
>information
>http://www.us.schott.com/hometech/english/products/borofloat/attribute/optical/index.html
>the transmittance is approx. 92% only. Optical glass has much higher 
>transmittance
>
>
I don't think so.  Look at the comparison with "Borosilicate Crown" glass
off the same page.  I think the 92% includes the reflection losses from the
two faces.
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