kiln wash

[lorin]

I was wondering if anyone has any suggestions regarding kiln wash. I mixed the kiln wash as directed. It is very thin as suggested.  I lightly washed the shelf in alternating directions, applying 6 coats. I placed the shelf in the kiln and brought it to 500 for 15 minutes and let it cool, removing all moisture overnight.

The first run on the shelf came out clean. The shelf was not flaking and the pieces came off the shelf nicely. Before using it again I vacuumed the shelf. The second run came out clean with no signs of chipping or peeling. Then came the third run and everything was ruined. There was kiln wash was stuck on everything. Each of the runs was the same pieces, same firing schedule, same glass. I used paragon kiln wash.  I don’t know what happened?!?!? I am using cheap glass (wissmach) for this large order, could that be the problem?

 

[Stephen Richard]

After the first fuse firing the kaolin in the kiln wash changes in such a way that it sticks to glass on subsequent firings. So you were lucky to get the second firing. After each high temp firing you need to put another coat od kiln wash over the existing, or recoat the whole

 

Stephen Richard

blogs at: http://www.verrier-glass.blogspot.com/ and  http://www.glasstips.blogspot.com/

[Azgardenguy]

Have you considered using thinfire shelf paper? While more costly it works great and you can use it about 3 times before it gets too brittle. It’s the only thing I use.

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