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bisque and glazing in one firing.

updated fri 14 nov 08


Antoinette Badenhorst on thu 13 nov 08

Dawn, no you're not doing anything wrong, but you have to figure out what works best for you in your circumstances. If your clay matures at ^6 it will not leave much porosity to suck in water from your glaze and allows the glaze to grab onto your pot. For that reason you want to bisque fire at a low enough temperature to allow your glaze to work the best. The best thing you can do is call the clay maker and ask them what the best bisque temp for your clay and the accompanying glaze would be.
You can raw glaze. That means that you can skip the bisque process, but fire the glaze firing as if it is a bisque firing. ( slowly raising the temp.) This is however a process that require some special attention and I would recommend that if you would want to do that, find someone that is doing a workshop about raw glazing so that you can see what the glaze should look like before you fire it. etc. I am not an expert on raw glazing.
Enjoy your potting journey!
Antoinette Badenhorst

-------------- Original message ----------------------
From: Dawn Kleinman
> I use Standard Clay #119 to throw. I use an electric manual kiln. I have
> been bisque firing to a cone 6 AND glaze firing to a cone 6. The glazes are
> mostly from MC6G -waterfall brown and others. I have never had a problem. At
> least, I don't think so. I keep some of my work for home use - microwave,
> dishwasher, years of use, no problem. Lately, I have been putting the
> greenware AND the glazed bisque in the same kiln load beacause I figure that
> if its at the same cone, why not.
> But now . . . .I have been reading that I should be firing my bisque at
> around cone 04 or the glaze won't stick.
> Am I making myself neurotic? Or should I just stick with what has been
> working??
> A little guidance here please
> Dawn
> just about to unload another cone 6 bisque, then wax, glaze and fire again
> at cone 6