Re: ATM Glass Type: "E-6"

[ATMmuto@subaru-soft.co.jp]

On Thu, 8 Aug 1996, Mark Suchting wrote:

>On Wed, 7 Aug 1996, M.E. Germann wrote:

>> Working With "E-6" Glass --
>> glass I got about ten years ago.  It is a white glass,

Hmmmm... I thought it's bit yellower than Pyrex(not sure...)

>As far as I remember it was made by Ohara in Japan, is a borosilicate and 
>has a marginally lower expansion ( maybe 20% ) than Pyrex.

In addition  "... has somewhat larger viscosity so that it's bit harder
to make bubble free block" my friend told so, I thought, when he chose
glass for his 30cm Cass. mirror. But that was 20 years ago ...

>Only going from distant memory here..

ditto :-)

(I thought E-4 is more "Pyrex like", by the way.)
        Nozomu Muto
-- 
Nozomu Muto(Mr.) c/o Subaru Software Inc.
1-2-1-902 Sinjuku, Sinjuku, Tokyo 160, Japan
FAX: +81/3-3356-0274, EMAIL: muto@subaru-soft.co.jp