Glazing is tough for a control freak like me, because you can never trust the way the piece will look coming out of the kiln. I often here references to the kiln gods for a successful firing. I totally get it.
Take this mug….it was glazed with a maroon underglaze which I use often. But it came out of the kiln purple. I have no earthly idea why, except the kiln gods have a weird sense of humor.
To start my “year of experimentation” off on the right foot I am taking an online course on glaze development by John Post.his course will focus on glaze development using a clay grid. I really have no idea what this means yet but yesterday I made a plaster cast so I can make the clay grids.
Next on my list is making test tiles to test all the new glazes I will be experimenting with. I hope to find some good ones,
What I am doing is called “Currie Grids”. I choose one glaze that I want to test and systematically make 35 small test batches of the glaze each one with different amounts of the chemicals but the same amount of colorants. I have yet to wrap my head around the science, or even the math but I can follow directions and that is what I am doing when making these batches.
Hopefully the science and math will eventually come.
My test tiles and grid take up one entire shelf of my kiln. Can’t wait to see the results.
My teachers were right all those years ago in chemistry class. Someday I would need to know this stuff. The problem is I have forgotten everything.
More to come!
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