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Kilnforming on a Sand Bed

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Re: Kilnforming on a Sand Bed

Postby marykaynitchie » Wed Mar 08, 2017 9:58 am

What kind of metal? You may want to review this video:
Kiln Shelves and Furniture
https://videos.bullseyeglass.com/videos/kiln-shelves-and-furniture/

Mary Kay
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Re: Kilnforming on a Sand Bed

Postby Ciaratwomey » Thu Mar 09, 2017 2:19 am

Hi Mary
I have a metal frame which slots together in different places to give various size squares and rectangles. I'm not sure which metal it is made of. I bought it in a glass shop which stocks bullseye here in uk and was advised to line it with fiber paper to use. I haven't used it yet but think it's mainly sold for making thick slabs. I wonder if I could use this to hold sand plaster mix , rather than specifically making a vermiculite box.
My second question is do I need 9mm or should 6mm blank work in this kiln forming procedure?
Thanks
Ciara
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Re: Kilnforming on a Sand Bed

Postby marykaynitchie » Thu Mar 09, 2017 10:04 am

Interesting--I have not seen such a tool. I think it would make sense to tell the glass shop what you intend to try, and see what they think. Is it designed for use in the kiln?

Mary Kay
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Re: Kilnforming on a Sand Bed

Postby jestersbaubles » Thu Mar 09, 2017 11:50 am

My guess is the strips are stainless. Slumpys sells some interlocking strips - http://www.slumpys.com/Warm-Glass-Molds/Lock-in-Mold

I think the thing to consider would be whether or not the height of the dam would be sufficient. I don't think the glass or sand would push out the strips, but will it be deep enough to accomplish what you envision?

2 cents,

Dana W.
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Re: Kilnforming on a Sand Bed

Postby Ciaratwomey » Fri Mar 10, 2017 2:10 am

Thanks Dana, I think the height probably is the main factor, I'll check. Ciara
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Re: Kilnforming on a Sand Bed

Postby ejgiebel » Sat Mar 11, 2017 2:59 pm

I have the interlocking stainless steel dams, and they will bow out a bit, so you'll need to put something heavy against the at least the middle of each side. They are pretty flexible to start, and at 1500 degrees they are even more flexible. It's not terrible, but if you do nothing, the piece will not be as square (or rectangular) as you might expect!
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Re: Kilnforming on a Sand Bed

Postby Lschnellinger » Sun Mar 25, 2018 9:48 am

Must we use “Number 1 Plaster” or can we use Plaster of Paris? I gather that they are different, but since I am unclear about the purpose of the plaster I don’t know how to choose a plaster.

If it HAS to be No 1, where do we get it?

Thanks for any help.
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Re: Kilnforming on a Sand Bed

Postby Lschnellinger » Sun Mar 25, 2018 9:51 am

Ciaratwomey@hotmail.com wrote:My second question is do I need 9mm or should 6mm blank work in this kiln forming procedure?
Thanks
Ciara


I also have this question. Why is 9 mm called for, and couldn’t we use 6 mm blank?
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Re: Kilnforming on a Sand Bed

Postby marykaynitchie » Mon Mar 26, 2018 8:42 am

The glass blank will be of uniform thickness at 6mm. When you slump that over a sandbed with texture, some of that mass will flow into the texture, which might cause deformation of the edges, or a back of the piece that is no longer even and flat after the glass has flowed. This would not happen with a 9 mm thick tile.

Mary Kay
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Re: Kilnforming on a Sand Bed

Postby Lschnellinger » Tue Mar 27, 2018 12:37 pm

Thanks for explaining about the thickness of the blank, Mary Kay!

And the plaster?

Lschnellinger@gmail.com wrote:Must we use “Number 1 Plaster” or can we use Plaster of Paris? I gather that they are different, but since I am unclear about the purpose of the plaster I don’t know how to choose a plaster.

If it HAS to be No 1, where do we get it?

Thanks for any help.
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