Cone 6 colour tests

Date: 9 April 2018
Clay: Keanes Stoneware 7

Following on from last week's Cone 6 tests. Adding different colour oxides in 50-50 mixture for HP and four different colour tests for 14Pine.

HP 
Colour tests 50:50 grid

Mixed up 250gms of Base Glaze and then divided it volumetrically into 5 equal batches.
Started the five test pots with double strength as they will be diluted by 50% when combined with another pot.

Added colourants as below:
A - 3% Copper Carbonate
B - 2% Cobalt Carbonate
C - 6% Red Iron Oxide
D - 12% Rutile flour
E - 8% Titanium Dioxide



14 Pine Street
Colour variations

Mixed up 200gms Base Glaze and divided it into four batches.
Added these colourants
1 - 0.375% Cobalt Carbonate, 6% rutile
2 - 0.25% Cobalt Carbonate, 3.5% Titanium dioxide, 2.25% Copper Carbonate
3 - 0.25% Cobalt Carbonate, 2.25% Copper Carbonate
4 - 0.25% Cobalt Carbonate, 3% Red Iron Oxide

Cone 6 tests

Three tests in recently fixed kiln.

Date: 7th March 2018
Clay: Keane's Stoneware 7

Hopeful Potter Matte

40      Potash Feldspar
20      Whiting
25      Eckalite (China Clay)
15      Silica

John Post Calcium Matte [JP. JPSM]

30.2    Ball Clay FX (Kentucky OM)
5.7      Frit 3134
32.5    Nepheline Syenite
16.3    Wollastonite
4.9      Whiting
10.4    Silica (Flint)

14 Pine
4.03     Frit 3124
28.20   Potash Feldspar
16.11   Whiting
19.17   Eckalite
32.50   Silica


Love them all.
Surprised JP wasn't more matte.
HP is lovely, read later its for ^8? Seems okay though, I"m going to perservere.
14 is taken from my Currie grid test at Pine Street. Initially I'd chosen another square but later it crazed so I went with another mix that hadn't.

Now to test with colour!