Paul Lewing on fri 9 nov 01
on 11/9/01 3:35 PM, Julie Shanks at juliekshanks@HOTMAIL.COM wrote:
> PLEASE HELP! anyone out there know of any "nontoxic" (no lead or barium) ^6
> red glaze recipes (electric kiln usage only)?
There are a slew of iron red cone 6 glazes out there, such a s Randy's Red.
They tend to be very low in alumina, so not terribly stable glazes, but they
don't have anything in them nastier than iron.
And you should be able to make bright red colors with the new cadmium
inclusion red stains. They are theoretically safe because the cadmium is
encapsulated in zirconium. Tony Hansen's 5x20 recipe is a great base for
those colors, since it has so much calcium in it. Just don't put any
opacifiers or other colorants with that stain. It will kill the red color.
And, as far as lead goes, even if you did use it in a cone 6 glaze, there
would hardly be any left after it was fired. It would have pretty much
volatilized by that temperature, leaving all of the danger to you in the
studio and none to the eventual buyer. Isn't that comforting?
Paul Lewing, Seattle
Julie Shanks on fri 9 nov 01
PLEASE HELP! anyone out there know of any "nontoxic" (no lead or barium) ^6
red glaze recipes (electric kiln usage only)?
i work at an arts centre and we are VERY cautious of our ingredients, as we
have little kids around and many restrictions as to what we can use.
thanks in advance,
joooleeeeee in canada
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