sharon miranda on tue 30 mar 04
Hi:
I need help with glaze formulation. I spent all of February testing
glazes(for cone 05-04) and came up with a number of nice base glazes.
But when I go to put color in them, the results are not good.
Specifically, I really love matte or semi-matte glazes (yes, I know
they are more likely to be problematic for functional pieces, but I use
them on the outside), and I'd really love a nice matte or semi-matte
glaze with some variation and interest,(like Pete Pinnell's weathered
bronze green!), but as soon as I add, say cobalt carb or copper carb
to color the glaze, the flux in the oxides turns the glaze into a gloss
glaze, with little interest.
Here's a recipe I tried from Val Cushing's book:
VC satin stone
frit 3124 45
Gerst.B 10
Neph sye 15
talc 5
whiting 5
flint 15
epk 5
This is a beautiful white satin stone glaze.
With 2% copper carb I got yukky bathroom turquoise.
Could anyone give me some ideas of what oxides combos I could use to
get, say a nice blue, or green glaze?
And, in order to keep a glaze matte, do I add, along with the colors,
an ingredient like, say, titanium or whiting? Doesn't that mess with
the "balance" of the glaze?
thanks for any advice!
Sharon Miranda, just cooking with a pinch of sugar, a dash of brandy....
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