Jump to content


Photo

Kilns and melting glass!!! How is this done??

  • Please log in to reply
6 replies to this topic

#1 whirlpoolm51

whirlpoolm51

    Viking 1

  • ****-
  • Posts: 702
  • Joined: 05 Jan 2012
  • Loc: pittsburgh,pa

Posted 28 January 2013 - 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

#2 llanitedave

llanitedave

    Humble Megalomaniac

  • *****
  • Posts: 22368
  • Joined: 25 Sep 2005
  • Loc: Amargosa Valley, NV, USA

Posted 28 January 2013 - 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.

Can someone fill in the blanks for me??


Pun intended? :wavey:

#3 kfrederick

kfrederick

    Gemini

  • *****
  • Posts: 3010
  • Joined: 01 Feb 2008

Posted 28 January 2013 - 04:08 AM

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

#4 PrestonE

PrestonE

    Surveyor 1

  • *****
  • Posts: 1756
  • Joined: 29 Apr 2005
  • Loc: San Miguel de Allende,Mexico

Posted 28 January 2013 - 09:05 AM

Join the following group...

http://groups.yahoo....ED_HOT_Mirrors/

Regards,

Preston

#5 John Carruthers

John Carruthers

    Skiprat

  • *****
  • Posts: 3545
  • Joined: 02 Feb 2007
  • Loc: Kent, UK

Posted 30 January 2013 - 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.

#6 Paul Drufva

Paul Drufva

    Vostok 1

  • -----
  • Posts: 197
  • Joined: 26 Jun 2011
  • Loc: Connecticut

Posted 30 January 2013 - 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.

#7 John Carruthers

John Carruthers

    Skiprat

  • *****
  • Posts: 3545
  • Joined: 02 Feb 2007
  • Loc: Kent, UK

Posted 31 January 2013 - 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.






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics