Posts Tagged ‘cobalt carbonate’

Floating Black ^6 ox –Speckled Dog Pottery

September 16, 2012 2 comments

Floating black —

–  colorants by percents — 

Rutile 2 —

  Cobalt Carb. 1.5. — 

RIO. 4  —- 

Manganese Diox  3


Kathryn Narrow’s Chun Glaze (from Leah Leitson) ^6 ox –John Britt

August 11, 2012 3 comments

Kathryn Narrow’s Chun Glaze (from Leah Leitson) Leah Leitson’s plate above.
Cone 6

Uses inside:

F-4 Feldspar             38

Whiting                      14

Zinc Oxide                 12

Ball Clay                      6

Flint                            *30*


Pick one:

Celadon: copper Carb         5%

Dark Blue: Cobalt Carb       5

Light blue: Cobalt Carb       1

Copper carb      1.25

Dark Green: Copper carb   6

Yellow: Redart clay              10

Colemanite Glossy Green (or blue) ^6 –Sharon Moormann Mande

April 23, 2012 Leave a comment
‎ Colemanite Glossy Green (or blue) ^6
Frit 3134 – 760
 Custer Feldspar – 1047
Whiting – 168
Gerstley Borate – 152
Ball Clay – 109
Flint – 760
Copper Carb – 90 for green
Add Cobalt Oxide – 15 for blue
We used it at the Saskatoon Potter’s Guild – from what I remember the biggest issue was speckling of the cobalt.  I’m going to mix a test batch of each and try them again also.

Steve Loucks Black Temmoku ^6 ox or red –Roxanne Hunnicutt

April 23, 2012 1 comment


Nepheline Syenite   – 40

Gerstley Borate  – 15

Whiting  – 10

Ball Clay  – 10

Silica  – 25

Iron Oxide 10

Barnard Clay  – 4

Cobalt Carbonate  – 1.5
Black Stain  – 2

Very stable glaze that does not run. Very good line glaze. Looks great over or under Old Opal Glaze. Gets slightly metallic in Reduction from the black stain. Regular  “Temmoku” without the cobalt and Black Stain added.

April 18, 2012 1 comment

bobs iron red

 bob’s base 

same glaze a bobs iron red bob cavenaugh

silica 27.28

epk kaolin 18.18

nepheline syenite 18.18

bone ash 9.09

dolomite 9.09

talc 9.09

deep river red/orange

red iron oxide 20.00 yes 20 percent lol

idk why the uneven number i just round them also is a very nice base glaze for transparent and semi trans

 blue to purplish

0.50  cobalt carb

5% manganes dioxide


transparent green celadon

3% copper carb

3% rutile

very nice transparent green thicker it can get floating green that looks runny we use this glaze alot to show leaf decorations and slips

 mottled blue and green

6% rutile

3% copper carb

1.50% cobalt carb

deep blue with a bit of green specks that break threw very nice i use it alot looks like a ruduction glaze another dark blue to green

another real dark blue better looking then the one above

3% cobalt carb

3 iron oxide

2.50 manganese diox

also i have not tried it but i think the colorant combo from ocean green im sure would be very nice in this glaze most of these look better thick idk what they might do on porcelain from what i know goes red orange, thats another animal lol been there

Opal Blue Glaze ^4 – 6 –Teresa Gagne

March 17, 2012 1 comment

Opal Blue Glaze ∆ 4 – 6
 Ferro Frit 3134 50
EPK 30
Flint 25
 total 125
 add: cobalt oxide 2.5 OR
cobalt carb 4.0
rutile 5.0
 This glaze settles quickly so you might want to add some epsom salts or bentonite. The bowl is made with a red stoneware and breaks dark. On a white clay body it breaks green. When refired to ∆06 it results in a lot of green. Similar results in oxidation/reduction

-Rick’s Turquoise Raku -Mimi Champlin

March 14, 2012 Leave a comment

Rick’s Turquoise

Gerstley Borate     1488 grams

Neph Sy    750

Lithium Carb   780

Superpax 723

Copper Carb 98


Firing range is cone 08-02 with optimum melting in the 04 range.

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