Mirror Blanks

[bkm2304]

Hi all,

Does anyone know where I can get mirror blanks from?

Thanks in advance, :thanx:

Richard

[astro744]

Willmann Bell have Pyrex blanks sizes from 1" to 12.5" and complete mirror making kits from 4.25" to 12.5". See http://www.willbell.com/ATMSupplies/ATM_Supplies.htm

[Saturnine]

Try Mathew at Telescopes & Astronomy in Adelaide, they list blanks and grits etc on their website or try some of the larger glass suppliers, they may cut you a disc of whatever size you want. I remember a fellow club member got a 15" X 1" blank from somewhere in Sydney a few years ago, sorry I don't remember the name of the supplier.

Good Luck

Jeff

[bkm2304]

Thanks, guys. I'll chase them up.:thumbsup:

Richard

[Geoff45]

Sydney Glass (http://www.sydneyglass.com/) can supply plate glass blanks.
Geoff

[astro744]

What size are you after?

[bkm2304]

Thanks, Geoff.


Hi, Astro,

12 or 16 inch.

Richard

[sopticals]

Know anywhere in Australasia one can aquire 30mm or thicker float glass or borosilicate plate glass? I know of suppliers in China that supply out to 70mm thickness but the problem is the minimum order thing,ie like 10 ton or 5000 pieces or 1 container lots. I be interested in grinding a 30+ inch mirror.Currently working on two 22" f5.2 mirrors and one 25" f4.6 mirror but stuck with 19mm float only. Mirror support could be an issue with the 25". I know it can be done as James Dobson went out to 24" on 19mm thickness for a workable mirror and I know of two 30"x1" mirror dobs that are ok.