May Luk on thu 18 nov 04
Hi all;
In my high alkaline currie grid test, I painted copper carbonated on parts
of the grids. It appears that the copper to from green - mild luster effect
[at a certain saturation point] - brown black [very saturated].
Is this an indication of local reduction? I have a poorly ventilated
electric kiln - no fancy ventilation like the American versions. If so, how
do I improve it so that the reduction does not weaken with my elements
Or it's the copper coming out in different formation [CuO, Cu2O,
CuCO3.Cu(OH)2, 2CuCO3.Cu(OH)2] because of variation in silica and alumina
levels. I have same observation with another high alkaline currie grid with
Copper Carb mixed into the glaze, but different flux set.
TIA
May
London, UK
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