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questions re: copper

updated sun 13 jan 02


Linda Titus on fri 11 jan 02


I now realize that using a copper glaze on a bathroom wall tile would be too
challenging because a) such difficulty of achieving an even bright copper
color; and b) the tiles probably would not last forever in such wet
conditions. So I have an experiment I'm thinking of trying, and before I
spend the money on the ingredients, I though I'd better check first with
this list.

I'm thinking about stirring fine copper mica into a clear glaze and painting
it onto a bisque wall tile. I'm told it can be fired up to 1600 degrees
farenheight. (If anyone knows what cone that is, please share.)

Do you think this would work? Meaning, would this (1) achieve a relatively
even bright copper color and stay that way; and (2) last forever in the

Should I add a third coat of plain clear to seal it well? Will one firing do
the trick?

Thanks in advance,

Linda Titus

iandol on sat 12 jan 02

Dear Linda Titus,

There are some excellent reduced In-glaze Copper lustre recipes to be =

These are fired to maturity then cooled to a lower temperate where they =
are reduced with a hydrocarbon gas atmosphere. The result is a metallic =
lustre which is embedded under the surface of the glaze.

See "Lustres- The Complete Potter" by Margery Clifton p40.

Best regards,

Ivor Lewis