On Sep 11, 7:21*pm, "dkat" wrote:


John and Ron suggest using EPA standards for water (note that cobalt, copper
and lithium are not listed by the EPA).

Copper is an essential nutrient that is become less available in our
modern food because it is being leached out of our soil by pesticides
and fertilizers. Amounts released by well made glazes are less than
dietary requirements.

The original concerns about copper was related to lead glazes
where poorly formulated copper glazes helps lead be more soluble.

In India, the switch from copper and brass water containers for
plastic is causing problems with water safety. Plastic contained
water depends upon sunlight to keep it from going foul.

--
Lee in Minneapolis.