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Bisque fire your pots to ^06 and then for ^6 glazes try some commercial
glazes either pre mixed wet or dry. Try a good satin matt glaze and add
different colorants - 1/4% cobalt carb for light blue, 1/2% for med
blue, 2% copper carb for green, 2% iron oxide for tan, 4-6% for brown,
1/2% cobalt and 2% iron oxide for a warm blue, etc. Get any ceramic
book and look at the colorant addition chart in the back.
Many underglazes work well at ^6 and some are now designed to work at
high cones in colors that traditionally won't take the heat. Those are
pinks and purples. Cover with a clear glaze. You won't get a real red
at cone 6 however.
Try a majolica glazes and use underglazes or mason stains to create
designs on the freshly glazed surface.
Good Luck! Let me know how it works.
Howard Street Charter School
710 Howard Street SE
Salem, OR 97302