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Ditto to what Kevin says. The uneven thickness means any quick change of temperature in the 100-200ºC range will allow the thinner parts to cool quickly enough to induce thermal shock.

Perhaps it's because i don't try to get all the glass off the screen, so i have thicker layers of glass on the metal, often with stringers from mesh to melt.

SR, If the kiln went up as fast as possible, glass pieces can shatter all over the kiln. This does not seem to me to be a sensible scheduling of the firing, especially as this will fracture the glass. Why would anyone want to spray glass around their kiln? Also it will clearly disturb the arrangeme...

yes
and for 6mm

Apologies, I did not take in that the initial post talked about glass all over the kiln - which I think is a bit of an exaggeration anyway. I have never had that happen. It could come from far too rapid a cooling, but then I think the glass on the shelf would have shattered too.
A mystery to me

I guess I need a lot more information to understand what you are doing, as I don't see how movement of the kind you describe would lead to fractures on 2mm glass that don't happen on 3mm,.

Black transparent and white transparent are oxymoronic where I come from. Don, For some reason over here it has been the tradition to call clear glass "white" and the white stuff "white opal" I agree with Cynthia's explanation of transparent black. Of course when we are looking ...

I don't see the break or shatter. What is the white in the middle of the coloured glass?

Dana, It is not the glass that pops off, buy it is the metal that spalls, leaving bits of oxidised metal over the surface of the glass. This spalling occurs as the metal contracts, usually below the temperature at which the metal will stick to the glass. If you choose high grade stainless for the gr...

Are you in the UK, Europe, North America? It affects the answers that are relevant.
Will the splash back be clear or opaque? That affects the answers too.
Any adhesive you use will take the place of any anti-splinter compound for the back.

Dana,
Dairy Queen does a lot of high temperature work. So it is not certain whether the temperatures are creating the incompatibility.
The thin film of irid is unlikely to cause incompatibilities.

Of course they can be used, but don't perform very well at the temps needed for the melt. They don't show up very well either.

Why do you need steel backing anyway? If you have circular steel supports and can attach the uprights to those supports, you have a strong structure. A 540mm dia piece 6mm or more thick can take a lot of wind.

You can also sprinkle a thin/fine layer of fine frit over the top of the assembled pieces. As indicated by Bullseye in one of their tips.

DonMcClennen wrote:What temp. do you call full fuse??

Don as you know Bullseye quote it as 804C for 10 mins. This of course varies from kiln to kiln.
By going as slowly as 100C/hr from the bubble squeeze temperature, you can often achieve the look you want 20C or more lower than usual.

The second set all I can think is to fuse again to a piece of thin clear, but not sure if that will correct the dog boning or not--it might just be dog boned with a clear outline then.

--jodi


yep!

There must be kiln builders in Australia. Find one and get a custom one made.
Yes the dichoric will work in acrylic.

1. score and break apart the fused together coasters. Cold work the edges or refire. 2. cold work or cut off the prominent portions and have slightly smaller coasters. Again cold work or re-fire. 3. you didn't ask for long term solutions, but one is to use them as elements in another project. 4. you...

It requires an extraordinary amount of shaking and agitation to get it mixed again, but it is possible.
Alternatives are saturated solution of borax or sprinkled clear powder or fine clear frit over the top of the piece.

What kind of shape are you trying to achieve? Is it a gentle bend, or more strong curve? Is it for a furniture setting?
You can take a mould from the original shape in various materials and then make a refactory mould from that.