Single Fire Glazing

This glazing style is also called once fire glazing and is applied to raw or greenware. I mostly slather on the slip with a brush. The recipe is 40% Feldspar 40% Ash 20% Ball Clay. I think this glaze has Maple ash made in the Koie cooker.

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• once_fire
• glazes
• pottery
• ceramics
• brushing
• slip
• slip_glazes

[hobbypotter]

I was wondering if you know which video shows the results of this glazing? Also wondered if you have success with glazing on greenware and instead of bisque?

[GindaUP]

@hobbypotter I have lots of photos of my pots in my Fotki site but I haven't done video on the earlier results. If a glaze has at least 10% and closer to 20% clay it could in theory be good for single fire glazing. I do it mainly because I wood fire and it conserves fuel, again, in theory. Wood firing doesn't always work out that way. I've used glazes from colleges that bisque and they worked on single fire. Do some tests and if the glaze doesn't stay on I guess add some clay.

[roxhun]

Gary: You do this on greenware!!! Why does the pot not .. get soggy and crack thru?

Rox

[GindaUP]

That's a good question. I did have a wide plate bowl that I glazed too fast both sides and my fingers popped through the sides so it's a balancing act of moisture content. The glaze needs enough H2O to flow but not soak the pot. Let it absorb/dry between inside and outside coats. Slip can also be applied to leather hard. Any glaze with about 20% clay will work, it has to shrink along with the clay in the firing. Subscribe, stay tuned, and stay in there eh!

[credenza1]

Thanks, Gary. I like the idea of single fire glazing. It is simpler and uses less energy.