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Lead in Glaze & cone temps (was Re: tea in teacups)


From: Mark Alexander (malexander06_at_TeacherArtExchange)
Date: Thu Mar 21 2002 - 14:37:47 PST

I have seen glazes with a label that says something like: "safe for use
with food if fired to cone #___." I was wondering how accurate kiln sitters
are, and if the possibility of kiln sitter inaccuracies means I shouldn't
risk using these glazes at all in K-8. Anyone know?
Also, does anyone have a link to a temperature chart for cones?

----- Original Message -----
From: "Michelle" <>
To: "ArtsEdNet Talk" <>
Sent: Wednesday, March 20, 2002 12:51 PM
Subject: tea in teacups

> I just had my ceramics students make teapots and teacups from clay and
> glaze. ..........Does the fact that they stained mean that they are not
> really food safe? I thought that as long as you used food safe (non lead
> based glaze) the item would be food safe.