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Mt Vision Granite - Copper

Experiments with Copper
Mt Vision Granite - Copper
Mt Vision Base Glaze with 5% Copper Carbonate, SG 1.43 on Dark Red


Following the progression, experiments with Copper are documented. Currently I have just two examples, a line blend test (below) and a sample bowl (above) using the left over 5% mixture to glaze its outside. It's interesting and very metallic with more copper.

Glaze Recipe

Material Amount
Mt Vision Granodiorite 70%
Wollastonite 30%
Copper Carbonate 1% - 5%
Bentonite 2%
103% - 107%


Kiln firing procedures are described here.


Test 1

Date 9/14/23
Type: Test Tiles
Temp: Cone 6
Kiln: Test Kiln (T28)
Clay: B-Mix
Glaze: Mt Vision Base Glaze, SG 1.43, 200ml batch
Additive: Copper Carbonate
Method: 5 tests of 1%, 2%, 3%, 4% and 5% Copper Carbonate by adding 2, 2, 2, 2 and 2 gm (cumulative 10 gm) without changing the amount of liquid.

Base Glaze with 1%, 2%, 3%, 4% and 5% Copper on B-Mix
MV Base
Copper Carbonate 1 2 3 4 5
Added +2g +2g +2 +2g +2g
Cumulative +2g +4g +5g +8g +10g
Sample 5 above, 5% copper, on 3 clay bodies, Dark Red, B-Mix and Sedona Red


Honestly these are not that interesting, especially compared to the Iron, Iron / Titanium and Cobalt experiments. The metalic glazes on tiles 4 and 5 are kind of neat-o, but are not for everyday use. Deeper exploration seems required, perhaps with additional materials.