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5 votes
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Is it possible to melt a glass bottle without a kiln?

Glass has a melting temperature of around 1400-1600°C (see here ), and most household ovens top out at around 200-250°C so no, you cannot melt glass in a normal home oven.
walrus's user avatar
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4 votes

How can one leave internal void cavity in fused glass piece

I've never tried this, so this answer will be largely speculation based on the physical properties. You can leave a void, but I don't think you would be able to make the void a complex or delicate ...
fixer1234's user avatar
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4 votes

Is it possible to melt a glass bottle without a kiln?

Revision based on comments on the question. This answer originally suggested a microwave kiln. Then I saw the discussion in the comments. To start with the bottom line, you can't melt wine ...
fixer1234's user avatar
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4 votes

Overcoming the 6mm rule in glass fusion

The results may depend a lot on luck, practice, and trial and error. You might need access to a machine shop to prepare whatever will serve as the "mold". I wouldn't count on using a process that ...
fixer1234's user avatar
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3 votes

Do kilns get hot enough to fire their own bricks?

Firebrick are thermally stable for the temperature range they are specified. However , some materials may cause chemical changes in certain types of fire brick and develop lower melting phases. I am ...
blacksmith37's user avatar
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3 votes

Overcoming the 6mm rule in glass fusion

The simple way to keep the form thin is to under fire it. If you fire to less than a full fuse the tension won’t pull the glass up to the 6mm height. If you have fine fruit or powder you can use a ...
Rob Caplan's user avatar
3 votes

Kiln elements melting at mid-fire temperatures

Nichrome melts at around 1400°C according to Wikipedia, so you'll need careful control to get the kiln itself to 1300°C, including (I suspect) ramping down the power as the kiln gets close to ...
Chris H's user avatar
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3 votes

Are there tell-tale signs that clay will crack when fired?

There are no tell-tale signs that a piece will crack, but there are definitely certain things that can lead to a piece cracking when fired. Significant variation in thickness from the thickest to ...
Ken Wallace's user avatar
3 votes

Are there tell-tale signs that clay will crack when fired?

Yes. Look out for "veins" in the clay as it is altered and manipulated from its original resting state. Veins might also look like threads or mini cracks.
user244's user avatar
  • 31
3 votes

Multi-unit pottery kiln - how hot can it go?

If the kiln is rated for 1950 degrees Fahrenheit, then that's about the highest you should fire it to. The number of rings you use isn't a function of how hot it gets but more a function of how much ...
rpcvth99's user avatar
3 votes

Is it possible to melt a glass bottle without a kiln?

If you are trying to slump glass into a form then, your oven, which can reach temperatures of 500 degrees may not be the answer. That said you could use your oven to raise the temp of the glass, ...
Ace's user avatar
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2 votes

Kiln elements keep burning out

The problem could be the Kanthal ( Fe, Cr, Al ) elements. Although they will tolerate a little higher temperature , they are "delicate" compared to the Nichrome type elements. Most consumer heat ...
blacksmith37's user avatar
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2 votes
Accepted

Kiln elements keep burning out

When the elements are connected directly to power, the only limitation is the inherent resistance of the elements. Ohm's law states that current is inversely proportional to resistance. The elements ...
fred_dot_u's user avatar
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2 votes
Accepted

Do kilns get hot enough to fire their own bricks?

Your firebricks will already have been fired, I'm not sure anyone makes kilns with green firebricks, they would move around when firing. On the other hand if you have used fire clay , fire cement, or ...
BobT's user avatar
  • 206
1 vote

How can one leave internal void cavity in fused glass piece

A fully encapsulated void in thin glass is difficult to impossible to do hot in a kiln. A carved out indentation open on one side is trivial. You could the encapsulate it by cold-fusing (i.e. gluing) ...
Rob Caplan's user avatar
1 vote

How to tack fuse glass frit and keep pores in glass

Try using the glass beads without grinding them to a powder first. The spaces between the spheres would then give you the pores you are looking for. Alternately you could mix in a material with a ...
rebusB's user avatar
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