slumping glass into a mold, and also creating a flat spot

[jerry keller]

I want to slump a piece of 14"x7" 3/8" glass into a curved mold, and create a flat triangular spot near the top, so I can glue another piece to it. I tried a test, and used a fibre board for the flat spot. Went to 1245 F, and it was close to what I'd want to achieve. But the fibre board seems toxic to my lungs, as does fibre paper. I'd like to find something that would be more user friendly. Possibly a ceramic tile with ludo on top....? I need to do 15 of these when I get the concept down.

[Bert Weiss]

Brad sells a stiff thin board. I think it is 110J You still have to burn it out, but it is more durable than the 970 papers, so there would be fewer burnout fumes in the long run.

[Marian]

Did you try to cold work the flat spot with with a grinder or abrasive pad? Are you slumping the flat spot on the bottom of your mold or balancing a tile on top while you slump? Ceramic tile is inert, use kiln wash.

[Susanbuckler]

Bert
What is 210J? Can it be used like fiber paper to dam glass? I found it on Brad's website but I do not see enough info for me to understand what it is and how to use it. Thanks
Susan

[Bert Weiss]

Bert
What is 210J? Can it be used like fiber paper to dam glass? I found it on Brad's website but I do not see enough info for me to understand what it is and how to use it. Thanks
Susan

It is a thin, stiff, board. I have messed around with it, but it is not one of my usual materials, in the studio. Ask Brad, if you have more questions about it.

[Morganica]

I want to slump a piece of 14"x7" 3/8" glass into a curved mold, and create a flat triangular spot near the top, so I can glue another piece to it. I tried a test, and used a fibre board for the flat spot. Went to 1245 F, and it was close to what I'd want to achieve. But the fibre board seems toxic to my lungs, as does fibre paper. I'd like to find something that would be more user friendly. Possibly a ceramic tile with ludo on top....? I need to do 15 of these when I get the concept down.

Kilnsafe + respiratory-safe can be a bit difficult to achieve. I was going to suggest simply getting some plaster, dolloping it on your wet bisque/ceramic mold (it won't stick if the mold is dry), and shaping it as needed, but you'll still need a respirator.

[Stephen Richard]

I think ludo would stick to the glass