David Hendley on wed 28 jul 04
Wayne, I had to change the title of your e-mail because the
question is not stupid.
Yes, you are on the right track concerning the awarding of
a "food safe" verdict for a piece of pottery - it is the glaze on the
interior and lip of the pot we are concerned with.
The outside of the pot can have a high barium copper leaching
oribe glaze and it is still OK.
You have probably heard the term "liner glaze". This is a
glaze that is formulated to be absolutely safe, formulated
specifically to "line" the inside of the pot.
I guess there might be some sort of radical limit for a glaze
on the outside of a pot that would make it not food safe, such
as chunks breaking off, but just about anything goes.
Now, the health of the potter is a different matter. One needs
to be careful in the studio when using outside-of-the-pot glazes
full of nasty ingredients.
David Hendley
david@farmpots.com
http://www.farmpots.com
----- Original Message -----
> For some time (years?) we've all been bantering and
> arguing and micro-defining what _is_ and what _is not_
> food safe.
> I need a clarification, since I was asked a question by
> a relative newbie. I couldn't give a definitive answer.
>
> In this example, assume a mug, or bowl, or serving
> piece in which the food/liquid/beverage is contained
> strictly "within" the vessel.
>
> If a "food-safe" (tested or "manufacturer alleged") glaze
> is used on the part of the vessel/pot/bowl/mug/ whatever
> in direct contact with the food (yes, including the rim
> where lips may reside), then may that vessel be
> considered food-safe if a "non" food-safe glaze is used
> on the outside?
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