Ron Roy on tue 1 dec 98
This glaze is going to have a very low expansion rate and is going to
present all kinds of problems on just about every clay body in present use.
I have the feeling there is a material left out - it only totals 82 and the
alumina and silica are way over the limits for a cone 10 glaze.
Glazes with only lithium or magnesium oxide as fluxes are used on bodies
with very low expansion rates - like those used with open flame and stove
top cooking.
RR
>Thanks to an alfred recipe kindly provided to me by Kurt Wild, I have come
>up with a super fantastic green glaze which I would like to share with you
>all. The base glaze is an old spodumene glaze. Two firings ago, I got quite
>a pleasant surprise. I was going for a subtle grey green. But the result was
>a thrilling beautiful lively warm green which I simply could not believe. My
>last firing confirmed its beauty by giving me another unexpected surprise.
>(some nice brown pots). Like all good things, alas it is a spirited beauty,
>the kind that can make your day or kick you in the ____. But to get that
>green again......!!!
>
>Cone 10 reduction
>
>22% flint
>43% spodumene
>17% kaolin (deviation from Alfred recipe which calls for 9 percent calcined
>kaolin and 8% regular kaolin)
>add
>
>1/2% chrome
>1/8% rutile
>1/8% nickel nitrate
>
>My sucessful trial was applied rather thick.
>Good luck!
Ron Roy
93 Pegasus Trail
Scarborough, Ontario
Canada M1G 3N8
Tel: 416-439-2621
Fax: 416-438-7849
Web page: http://digitalfire.com/education/people/ronroy.htm
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