Nancy Jonnum on sun 17 jan 99
I have been a potter for many years. During this time I have continually
experimented with glazes. Because of this, I have collected many glaze
recipes and the situation has gotten totally out of hand. Buckets of glazes
fill every nook and cranny of my small studio, and glazing day becomes a
nightmare. Test tiles occasionally fall from nowhere in particular. I would
like to become the mistress of all this clutter.
My goals for the present are to limit the number of glazes I use and to make
absolutely certain that these are stable and safe with food. I fire my
functional ware at cone 5. I have been testing some glazes that use local
clay and ash. I hope that these glazes will add some character to cone 5
oxidation firings.
I am going to write the glaze recipes below. I am hoping that some of the
glaze gurus will let me know what they think of these glazes in terms of
safety. I am presently bisque firing some test cups. I'll send these to
Alfred to further test for release of metals. I don't really know how much
work it is for those of you who are knowledgable about glazes to take a look
at mine. I thank you in advance for your efforts.
I found these glazes in Ceramics Monthly, April 1980. They were submitted by
Patrick Fleming.
Mottled Base Blaze (^04--^10)
Gerstley Borate 40%
Plastic Vitrox 40%
Local Earth 20%
may add 5% iron oxide or rutile
Mottled Base Glaze with equal parts
Gerstley Borate 33%
Plastic Vitrox 33%
Local Earth 34%
may add 5% iron oxide or rutile
Light Green Glaze
Wood Ash 33.3%
Gerstley Borate 33.3%
Local Earth 33.3%
may add 5% iron oxide or rutile
I have saved a recipe for Broken Blue Glaze that was submitted to the list by
John of Frog Pond Pottery. I hope to experiment and have this glaze test too.
Many thanks,
Nancy--from Llano, California, where it is a beautiful day
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