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

Naragon White cone 6 results

Naragon White version 1

31%    Soda Feldspar

2      Bentonite

Mixed dry and then water added. Divided into three pots of 66.6ml each.

The triaxial with three corners as follows starting from the apex:

A 10%  Tin Oxide  (100 x 10 x 33.3/100) added 3.33g
B 7%    Copper Carbonate (100 x 7 x 33.3/100) added 2.33g
C 2%    Cobalt Carbonate, 10%  (100 x 10 x 33.3/100) added 0.66g
   10%   Rutile flour (100 x 10 x 33.3/100) added 3.33g

Fired to cone 6 in my Ward kiln. Slow cooled.

Results
Colour needs mixing with a blender, appears a bit grainy. Base glaze is pinkish from tin oxide. Poured rather than dipped. Need to repeat this test but concentrating on the lighter oxides, tiles 1, 2 and 3.
I like the way the rutile has added texture especially to the Cobalt corner.

My first glaze test

My first attempt at mixing a glaze recipe from raw materials. I really love the images on the Blog Ceramique site and optimistically chose one of their Triaxial blends for my first glaze test. The base glaze recipe from Blog Ceramique is:

31     Kona F4
26     Gerstley Borate
6       Calcium carbonate
4       Dolomite
25     Silica
8       EPK

2      Bentonite

My translation substituted with Australian ingredients was this:

31     Soda Feldspar
26     Frit 3134
6      Calcium carbonate
4      Dolomite
25    Silica
8      Eckalite

2      Bentonite

Mixed dry and then water added. Divided into three pots of 66.6ml each.

The triaxial with three corners as follows starting from the apex:

A 10%  Tin Oxide  (100 x 10 x 33.3/100) added 3.33g
B 7%    Copper Carbonate (100 x 7 x 33.3/100) added 2.33g
C 2%    Cobalt Carbonate, 10%  (100 x 10 x 33.3/100) added 0.66g
   10%   Rutile flour (100 x 10 x 33.3/100) added 3.33g