Cone 6 Glazes

Testing some cone 6 glazes from John Britt's Mid-Range Glazes and online resources

GREENS and BLUES

Alicia Clausen's Turquoise Matte 'The One'
 Nepheline Syenite 60
 Strontium Carbonate 25
 Silica 9
 EPK 4
 Lithium Carbonate 2
 

Copper Carbonate 3.5
 Bentonite 4
 Epsom Salts 1

Chun Seafoam
Soda Feldspar 41
Silica 27
Whiting 15
Eckalite 5
Zinc Oxide 12

Copper Carbonate 5
Titanium Dioxide 5
Bentonite 2

Pinnell Seafoam
Soda Feldspar 51.3
Strontium carbonate 25.5 

EPK 13.6
Frit 3134 9.6

Copper Carbonate 5
Titanium Dioxide 5

Pinnell's Strontium Matte 
Nepheline Syenite 57
Silica 8.6 

Ball Clay 9.5
Strontium Carbonate 19
Lithium Carbonate 5.9

Copper Carbonate 5
Titanium Dioxide 5
Bentonite 2

Arrowmont Blue Green 
Nepheline Syenite 44.6
Silica 13.3 Whiting 11.1
Eckalite 13.3
Gerstley Borate 11.1
Lithium Carbonate 6.6
Titanium Dioxide 6.2

Cobalt Carbonate 1
Bentonite 2

LIGHT BLUE

Selsor Chun
Soda Feldspar 34
Silica 30
Whiting 10
Dolomite 6
Frit 3134 17
Zinc Oxide 3
Tin Oxide 1

Red Iron Oxide 0.5-2
Bentonite 2

PURPLE

Ashley’s Best (purple)
Nepheline Syenite 27.2
Silica 25.3
Dolomite 16.2

Eckalite 13.3

Talc 11.4
Lithium Carbonate 6.6

Cobalt carbonate 2-4
Bentonite 2

CRAWL

Lalone Crawl
Neph Syenite 70 

Ball Clay 5
Magnesium Carbonate 25

YELLOW

V.C. Matte (Yellow) 
Nepheline Syenite 44.4
Silica 15.6 

 Whiting 8.9
Eckalite 11.1
Gerstley Borate 11.1
Lithium Carbonate 8.9

Rutile 4
Titanium Dioxide 6-10
Bentonite 2

HP Stoneware results

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 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