Jean Stephenson on sun 30 nov 97
Why would you not recommend this for food if the barium is substituted
for strontium? I've just glazed half of a casserole with a similar
glaze. Thanks. Jean
Louis Katz on tue 2 dec 97
> Why would you not recommend this for food if the barium is substituted
> for strontium? I've just glazed half of a casserole with a similar
> glaze. Thanks. Jean
>
I am not sure if this post is aimed as a response to mine, but the Oribe
that we use at TAMU-CC (Ihave been informed not to use the acronym without
the dash) with the Strontium Substitution often comes out with a metallic
surface. My assumption, erring on the side of safety is that the surface is
soluble.
Louis
Ron Roy on wed 3 dec 97
I remember some one saying on this list that the oribe glaze they had on a
bowl changed colour when in contact with some food. Copper - that black
stuff lying - exposed, on the surface of oribe glazes - is susceptible to
attack - probably by acid food. This means the copper is going into the
food - I don't think you want too much copper in your body. I also don't
think you want your pots changing colour when your customers use them.
If the glaze is not durable (read susceptible to acid attack) then the
copper in the glaze will be leached out as well. The rate of leaching will
be determined by the relative durability of the glaze. In the case of acid
attack this relates to the amount of silica in a glaze - as I understand
it.
Ron Roy
93 Pegasus Trail
Scarborough,Canada
M1G 3N8
Evenings, call 416 439 2621
Fax, 416 438 7849
Studio: 416-752-7862.
Email ronroy@astral.magic.ca
Home page http://digitalfire.com/education/people/ronroy.htm
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