Raku Glazes with Colorant Oxides:

Browns

BROWN

Gerstley Borate 80%
Yellow ocher 20%
  100%

Coffee

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Rutile 18%

Yellows

RUNNY IRON YELLOW

Gerstley Borate 50
Borax 40
Red Iron oxide 10
Rutile 3

Greens

RUNNY GREEN

Gerstley Borate 50
Borax 50
Cobalt Carbonate. 1
Iron Ox. 5
Rutile 5

Poison Ivy

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Chrome Oxide 8%
Green Nickel Oxide 31.5%

 

Smokey Mountain

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Nickel Oxide 5%
Aluminum Oxide 3%

Cromalux

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Aluminum Oxide 17%
Chrome Oxide 3.5%

APPLE CRACKLE

Gerstley Borate 80
Nepheline syenite 20
Manganese dioxide 3
Cobalt oxide 1

Blacks

New Rogers Black Raku Glaze...

Potash Feldspar 20
Gerstley Borate 80
Red Iron Oxide 10
Cobalt Carbonate 10
Black Copper Oxide 10

 

Chris Thompson's Black...

Frit 3110 30
Nepheline Syenite 20
Gerstley Borate 50
Manganese Dioxide* 4.5
Cobalt Oxide 4.0
Copper Oxide 4.5
Iron Oxide 3.5

Omit the Manganese Dioxide and the glaze is still a nice black.

Tsuya's Mistake (Raku)

Copper Carb 50
Frit 3110 50
Total 100

FLAT BLACK

Gerstley borate 50
Borax 50
Red Iron ox 10
Rutile 10
Cobalt Carbonate. 2

 

Black Widow

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Black Copper Oxide 71.7%

FLAT BLACK

Gerstley Borate 50
Borax 50
Iron ox. 10
Rutile 10
Cobalt Carbonate. 2

BLUES:

Hawaiian Copper Blue. Fired to cone 06.

Bone Ash 20.00
Gerstley Borate 80.00
Add: Tin Oxide 1.30
Copper Carbonate 5.00
Cobalt Oxide 2.50

Blue Black Purple

Gerstley Borate 50
Nepheline Syenite 50
Copper Carb 50

 

ALKALINE BLUE
Frit 3110 70
Flint 10
Soda ash 10
Gerstley borate 5
EPK kaolin 5
Copper Carb. 3

CURDLE BLUE

Gerstley Borate 50
Borax 50
Cobalt Carbonate 1/3%
Rutile 3

Blueberry

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Zinc Oxide 34%
Cobalt Carbonate 17%
Chrome Oxide 9%

Purple Water

Frit 3110 70
Gerstly Borate 5
Flint 10
Soda Ash 10
E.P.K. 5
Add Manganese (2% - 4%)

Tear Drops

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Soda Ash 6.7%
Cobalt Carbonate 9.2%
Cryolite 8.1%

Coil Water Blue

Frit 3110 700
Gerstley Borate 50
Flint 100
Soda Ash 100
Copper Carb. 30
E.P.K. 50

Water Blue

3110 70
Gerstly Borate 5
Flint 10
Soda Ash 10
E.P.K. 5
Copper Carb 3%

COPPER SAND

G.B. 8
Bone Ash 2
Copper Carbonate 1/2
Cobalt oxide 1/4

Speckled Blue

Gerstly Borate 70
Nepheline Syenite 30

 

Add:

Cobalt Carbonate 5 plus or minus(depending how many speckles you want)

Mix the glaze base with water then add the DRY Cobalt to the liquid. You might want to try this method with your favorite glaze. This is a clear glaze base.

P.S. mix only small amounts, for re-mixing this glaze will turn it blue with out the speckles.

Copper Sand from Gordon Hutchins in Canada.

Gerstley Borate 436 g
Bone Ash 145g
Copper Carbonate 28g
Cobalt Oxide 14g

 

Reduce lightly - 1-2 pieces of newspaper if you want colors - reduce a lot if you want copper penny.

REDS

Tutti Fruity (reduce in sawdust)

Gerstley Borate 80
Nepheline Syenite 10
Talc 10
Copper Carbonate 5

Raccoon Copper (shiny) - recipe for 1110 gm batch

Kingman (potash) feldspar... 120
Gerstley Borate 630
Flint (silica)200 mesh) 120
Ball clay 60
Barium carbonate 60
Copper carbonate 120

COPPER RED RAKU

Colemanite 63
Custer Feldspar 12
Silica 12
Ball 6
Barium 6
Copper Carbonate 12

GLASS RED

Gerstley Borate 50
Borax 50
Red Iron Oxide 10
Copper Carbonate 5

TOMATS RED "melts quickly"

Gerstley Borate 50%
Borax 50%
Add to base:  
For Red: copper oxide 20%
red iron oxide 5%
For Blue: copper oxide 3%,
cobalt ox 3%

Kev's Copper Red

Frit 4508 90%
Kaolin 10%
Tin 5%
Copper Carbonate 1%

Tomato Red Raku

Borax 50
Gerstly Borate 50
  100
Copper oxide 20
Red iron oxide 5

Del Favero Luster:

Gerstly Borate 80
Cornwall Stone 20
Copper Carbonate 2

Reynolds Rap: (a very fun glaze)

Gerstley Borate 63
Custer Spar 12
Silica 12
Ball Clay 6
Barium Carbonate 6
Copper Carbonate 12

Multi Colored Copper Sand (Parts)

Gerstley Borate 8
Bone Ash 2
Copper Carbonate .5
Cobalt Oxide .5

LUSTER:

Note: Luster are not always the easiest to control. Techniques and opinions abound. Survey says the best way to achieve an intense surface is to do a total reduction with minimal combustibles.

Diane's Rainbow

Gerstly borate 300
Flint 100
Nepheline Syenite 100
Spodumene 150
Lithium Carbonate 100
Copper Carbonate 30

RAKU LUSTER

Gerstley Borate 80%
Cornwall stone 20%
Copper Carbonate 2%

COPPER PENNY

Gerstley Borate 80
Nepheline Syenite 20
Add  
Yellow ochre 8
Copper Carbonate 4
Cobalt Carbonate 1

 

LUCY'S LUSTER (by vol.) (parts)

Black copper oxide 2 Cups (or Copper Carbonate. 4 cups)
Gerstly borate 6 cups
F-4 Feldspar 1 cup

PALE LEMON LUSTER

Colemanite 75%
F/4 Soda Spar 25%
Copper Carb 3.0%
Manganese Dioxide 1.5%

 

Lizard Skin Raku Glaze:

Borax 8.4%
Colemanite 58.8%
Lithium Carbonate 12.6%
Magnesium Carbonate 3.4%
Nepheline Sy 16.8%
Total: 100%
Add: Copper Carbonate 3%

Lemon Luster

Gerstley Borate 1500
Copper Carbonate 45
Manganese Dioxide 20

Halloween

Gerstley Borate 80%
Nepheline Syenite 20%
Total 100%
Add:  
Yellow Ochre 9%
Manganese Dioxide 11%

Kevin Van Winkle's Wonder Black 

80/20 Base  
Red Iron Oxide 4%
Manganese 3%
Cobalt Oxide 2%
Copper Carbonate 4%

Pale Lemon Luster Raku

Colemanite 75
Soda Feldspar 25
  100
Copper Carbonate. 3.0
Manganese Dioxide 1.5

Copper luster Raku Glaze:

Colemanite 82
Cornwall stone 18
  100
Cobalt Carb 3
Copper Carb 5

Susan Winthrop's "TURQUOISE LUSTER"

Frit 3110 1000
Copper. Carbonate. 30
Bentonite 20
Tin ox. 30

Pale Aqua Luster Raku

Colemanite 25
Cornwall Stone 75
  100
Cobalt oxide 0.1
Copper Carb 3.00

Turquoise Luster. Cone O8.

Ingredient                                    Percentage

Frit 3110 1000 92.59
Copper Carbonate 30 2.78
Bentonite 20 1.85
Tin Oxide 30 2.78
    100.00

Copper Luster (reduce in sawdust)

Gerstley Borate 80
Cornwall Stone 20
Add: Copper Carbonate 3
Red Iron Oxide 1

For Gold Luster add 5% silver nitrate   instead, reduce in straw

Other Lusters: Over Glaze Lusters

Turquoise lusters

Copper sulfate or cupric chloride 10
Fritt 3110 5

 

Brownish Purple-

Manganese dioxide 10
Fritt 3110 5

 

Gold Iridescence

Bismuth Subnitrate 10
Frit 3110 5
Silver Nitrate 10

*Also Iron Chloride over spray/ poisonous

TRY ADDING 5% -10%

MASON STAINS TO ANY BASE GLAZE.

Enamels: for re- firing decoration

Japanese Enamels

Colemanite 15
Frit3134 150
Flint 30

Japanese Enamels

Colemanite 700
Frit 160
Flint 150