Flat round discs

[julieHB]

Another suggestion for you  :

Use a diamond core bit of the right size. Normally one uses the glass with the hole in, but I cannot see why it cannot be used to make circles, as long as you get a drill bit where the core can easily be "poked out".  The circles/cores would be equal in size. They will need fire polishing to achieve a perfect smooth edge, but that can easily be achieved in a kiln.

Here is one place to get some info on how to drill in glass: http://www.eternaltools.com/how-to-drill-glass/

[Zeldazog]

Brill idea Julie!

[julieHB]

Brill idea Julie!

Thanks, Dawn - I might even use that idea myself 

[Martman]

Thanks Julie I will give it a go.

Mart

[julieHB]

I ordered myself a couple of the eternal tools core drills, and had a little go:


small circles by JulieHB, on Flickr

The glass I cut was the thin BE glass (1.5mm thick?). The biggest circles in the picture is about 18mm, and the smaller size about 13mm.

A couple of observations - the diameter of the final circle is 1.5-2mm smaller than the specified drill diameter. I you need a perfect edge without melting the glass you still need to cold work the edges with a grinder or diamond pad/sickle stone before you fire polish them.

for me, who just want to fuse a few layers together to equally sized cabs it works very well. 

[Pat from Canvey]

Thanks for that info Julie. Unfortunately when I had to do about 100 circles some years ago for the frame of a large panel, each was about 2 inches in diameter. I chickened out and got the kids to foil them, also the small rectangles for the frame.
Can't find the original photo but heres a corner of the panel showing part of the frame plus a bit of sky. I foiled the white triangles             

[julieHB]

Oh, well done, Pat - that must have been a LOT of work!!!

[Pat from Canvey]

Thanks Julie. It took 3 months to make.

[Sarah999]

Hi. Just found this post from yonks ago.

If I pile 3mm thick glass (cut to 1cm by 1cm) on top of each other (3 of them as suggested) do you know how big these circles will be?

Thanks.

Sarah.

[Trudi]

One way to find out x

[Jane C ♫]

Freeze and fuse is a great idea for this - if you get the firing just right then you'll get lovely clean corners. Use an electric toothbrush or something to vibrate your mix to get the worst of the air bubbles out before freezing.

[Nicknack]

Freeze and fuse is a great idea for this - if you get the firing just right then you'll get lovely clean corners. Use an electric toothbrush or something to vibrate your mix to get the worst of the air bubbles out before freezing.

Years ago, in the 70s, I did a course on Lost Wax Casting, and our teacher (an extrovert eccentric! ) used a vibrator bought from a sex shop to get the bubbles out of the casting medium.  It was the first time (and, I think, the last) that I had seen one.

Nick

[fionaess]

What a very interesting thread