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Equipment Discussions >> ATM, Optics and DIY Forum

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whirlpoolm51
professor emeritus
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Reged: 01/05/12

Loc: pittsburgh,pa
Kilns and melting glass!!! How is this done?? new
      #5647307 - 01/28/13 01:24 AM

I am very intrested in how this is done and what types of glass you can use to make your own mirror blanks!!

I know somewhat of how a kiln works but what types of glass you can use that will work and how to mold them is where i get confused

Can someone fill in the blanks for me?? and would this be possible for me too do?? I am very good with all kinds of tools so operating a kiln wouldnt be the problem its the details of how much heat, what types of glass etc etc that i need informed on


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llanitedave
Humble Megalomaniac
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Reged: 09/26/05

Loc: Amargosa Valley, NV, USA
Re: Kilns and melting glass!!! How is this done?? new [Re: whirlpoolm51]
      #5647318 - 01/28/13 01:37 AM

I can't help, but I'd be interested in the same types of things. There might be one in my future.

Quote:

Can someone fill in the blanks for me??




Pun intended?


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kfrederick
Carpal Tunnel
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Reged: 02/01/08

Re: Kilns and melting glass!!! How is this done?? new [Re: llanitedave]
      #5647399 - 01/28/13 04:08 AM

http://www.mdpub.com/index.html

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PrestonE
Carpal Tunnel
*****

Reged: 04/29/05

Loc: San Miguel de Allende,Mexico
Re: Kilns and melting glass!!! How is this done?? [Re: whirlpoolm51]
      #5647617 - 01/28/13 09:05 AM

Join the following group...

http://groups.yahoo.com/group/RED_HOT_Mirrors/

Regards,

Preston


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John Carruthers
Skiprat
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Reged: 02/02/07

Loc: Kent, UK
Re: Kilns and melting glass!!! How is this done?? new [Re: whirlpoolm51]
      #5651718 - 01/30/13 07:33 AM

this idea pops up regularly. Unless you just want to slump glass into a mould then you need some serious equipment. Melting glass is easy, fine annealing is the hard part. I worked in the glass trade for 25+ years where I had access to kilns and various glass types - after a few tries I bought my Duran fine annealed blanks.
It is a fun experiment though and some people have had some success.


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Paul Drufva
super member


Reged: 06/26/11

Loc: Connecticut
Re: Kilns and melting glass!!! How is this done?? new [Re: John Carruthers]
      #5652034 - 01/30/13 10:57 AM

I hope you checked out the link provided by kfredrick above.
It will answer all you questions and more. Many modern glass kilns have programable annealing cycles which can be controled over a period of several days.


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John Carruthers
Skiprat
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Reged: 02/02/07

Loc: Kent, UK
Re: Kilns and melting glass!!! How is this done?? new [Re: Paul Drufva]
      #5653590 - 01/31/13 04:01 AM

Yes indeed, a lot of equipment available. Annealing is still a bit of an art though. You can stick religiously to the calculated thermal profile yet 2 out of 3 blanks in the same kiln will show strain lines. My best results came from a well packed kiln, the mass of glass acted as a thermal buffer with the centre blanks much better annealed than those around the sides.
It is possible if you have the gear, a large power budget and the time to learn.


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