C/5/6/7 glazes:
Some mid-fire notes:
Clear Glazes:
CLEAR C/ 5-6
| Gerstley Borate | 48% |
| Flint | 30% |
| Kaolin | 22% |
Patti's Crystal Clear ^5-7
| Gerstley Borate | 10.5% |
| Whiting | 4.0% |
| Nepheline Syenite | 15.0% |
| Kaolin | 5.0% |
| Flint | 15.5% |
Cone 5-6 crackle glaze
| Nepheline Syenite | 70 |
| Whiting | 20 |
| Six Tile clay | 10 |
Clear C/6
| Spodumene | 50% |
| Gerstley Borate | 25% |
| Flint | 25% |
| Bentonite | 1% |
II CLEAR
| Nepheline Syenite | 47.3% |
| Gerstley Borate | 27% |
| Flint | 20.3% |
| China | 5.4% |
Glaze Name: Clear (Ian Begg)
Cone: 5 and 6
Surface: glossy, shiny
Firing: oxidation
1
| Ferro Frit 3134 | 50 % |
| EPK | 30 % |
| Silica | 20 % |
| Totals: | 100% |
Glaze name: Clear (Huddleston)
Cone: 5-6
Color: transparent clear
Surface: glossy, shiny. Firing: oxidation
2
| Flint | 26% |
| Kona F-4 spar | 32 % |
| Wollastonite | 06 % |
| OM-4 Ball Clay | 10 % |
| Frit P-54 | 16 % |
| Whiting | 10 % |
| Totals: | 100% |
The Blues:
Float Blue (Cone 5 Ox)
| Nepheline Syenite | 47.3% |
| Gerstly Borate | 27% |
| Silica | 20.3% |
| EPK | 5.4% |
| Cobalt Carbonate | 1% |
| RIO | 2% |
| Rutile* | 4% |
*Dark Rutile for dark blue.
Chappell s Clay and Glazes for the Potter pg 210
Cone 5-6 Ox
| Nepheline syenite | 47.3% |
| Gerstley Borate | 27.0% |
| Silica | 20.3% |
| EPK | 5.4% |
| Red Iron Oxide | 2.0% |
| Cobalt Oxide | 1.0% |
| Rutile (milled) | 4.0% |
| CMC* | 1tsp |
(May substitute with 2% Bentonite)
Cone 5 oxidation. Turquoise matte
| Nepheline Syenite | 60% |
| Strontium Carbonate | 25% |
| Lithium Carbonate | 2% |
| EPK | 4% |
| Flint | 9% |
| Copper Carbonate | 4% |
| Bentonite | 2 % |
Ron Roy Cone 6-10 oxidation navy blue
| Albany slip | 80% |
| Gerstley Borate | 20% |
| Cobalt carbonate | 5% |
Glaze name: Floating Blue-Chappell
Cone: 6
| Recipe: | Percent | Batch |
| Nepheline Syenite | 47.30% | 2365 |
| Gerstley borate | 27.00% | 1350 |
| Flint (325m) | 20.30% | 1015 |
| EPK | 5.40% | 270 |
| Totals: | 100.00 % | 5000 gm |
| Cobalt oxide | 1.00% | 50 |
| Red iron oxide | 2.00% | 100 |
| Rutile | 4.00% | 200 |
| CMC | 0.15% | 8 |
Unity Formula for Floating Blue-Chappell:
0.100 K2O 0.554 Al2O3 4.074 SiO2
0.420 Na2O 0.485 B2O3 7.4:1 Si:Al Ratio
0.476 CaO
0.004 MgO
Percentage Analysis:
| 61.61 % | SiO2 |
| 14.23 % | Al2O3 |
| 8.49 % | B2O3 |
| 2.37 % | K2O |
| 6.55 % | Na2O |
| 6.72 % | CaO |
| 0.05 % | MgO |
Base Recipes with Colorant Variations
*Brutus Base*
| Albany Slip | 43 % |
| Wollastonite | 38% |
| Whiting | 15% |
| Lithium Carbonate | 2% |
| Bone Ash | 2% |
| For a Grey
blue add Cobalt |
1% |
| For an orange Add Red Iron Oxide |
3% |
| And Rutile | 1% |
Pinnell Strontium Matt:
| Lithium Carbonate | 1.0% |
| Strontium Carbonate | 20.0% |
| Nepheline Syenite | 60.0% |
| Ball | 10.0% |
| Flint | 9.0% |
| Weathered Bronze | |
| Titanium Dioxide | 5.0% |
| Copper Carbonate | 5.0% |
| Weathered Blue | |
| Cobalt Carbonate | .15% |
| Copper Carbonate | 4.0% |
Blacks:
Metallic Black cone 5-6
| Gerstly Borate | 11% |
| Whiting | 5% |
| Potash Feldspar | 79% |
| E.P.K. | 5% |
| Cobalt Carbonate | 2% |
| Copper Carbonate | 4% |
| Manganese Dioxide | 4% |
Metallic Glossy Black
Oxidation Cone 6 - 8
| Feldspar | 71.5% |
| Whiting | 4.9% |
| Gerstley Borate | 9.2% |
| Kaolin | 4.4% |
| Copper Carbonate | 3.0% |
| Manganese Dioxide | 3.0% |
| Cobalt Carbonate | 1.5% |
Black ^6 oxidation [^7 in sitter] from Brian Kemp
| Potash feldspar | 42% |
| Silica | 26% |
| Whiting | 15% |
| Kaolin | 15% |
| Zinc oxide | 12% |
| Red iron oxide | 8% |
| Cobalt oxide | 1% |
Gunmetal Gray Cone 6
| Potash feldspar | 39.15% |
| Flint (silica) | 25.35% |
| E.P.K. | 7.32% |
| Whiting | 12.67% |
| Zinc Oxide | 6.76% |
| Cobalt oxide | 2.53% |
| Red iron oxide | 3.66% |
| Manganese Dioxide | 2.53 % |
Matte Glazes:
White Satin Matt cone 4-7, oxidation
| Potash Feldspar | 52% |
| Whiting | 19% |
| China clay/ EPK | 14% |
| Zinc oxide | 9% |
| Flint | 6% |
Smooth Matt C/6
| Lepidolite | 23% |
| Magnesium | 2.3% |
| GB | 5.4% |
| Wollastonite | 20.8% |
| China Clay | 14.7% |
| Flint | 29.0% |
| Flourispar | 4.8% |
Satin Matt C/6
| Potash feldspar | 34.9% |
| Whiting | 12.6% |
| Zinc | 25.8% |
| China | 4.1% |
| Flint | 22.6% |
Satin Matt
| Potash | 39.7% |
| Whiting | 28.6% |
| Kaolin | 13.8% |
| Flint | 17.9% |
Reds:
Cone 6. Tomato Red
| Nepheline Syenite | 55% |
| Silica | 25% |
| Kaolin | 10% |
| Dolomite | 10% |
| Bone Ash | 10% |
| Red Iron Oxide | 10% |
| Bentonite | 2% |
"Floating Red"
| Gerstley Borate | 55 |
| Talc | 15 |
| Flint | 30 |
| 100 | |
| Add: RIO | 15 |
Cone 6. Purple
| Potash Feldspar | 37% |
| Gerstley Borate | 12% |
| Dolomite | 6% |
| Talc | 14% |
| Kaolin | 5% |
| Silica | 23% |
| Zinc Oxide | 3% |
| Cobalt Carbonate | 2% |
Deep Purple, electric cone 6
| Gerstley borate | 8.4% |
| Nepheline Syenite | 14% |
| (potash) feldspar | 27% |
| Whiting | 12% |
| Lithium carbonate | 3.7% |
| Magnesium carbonate | 1.7% |
| Flint | 33% |
| Bentonite | 2% |
| Tin oxide | 5% |
| Cobalt carbonate | 0.6% |
| Chrome oxide | 0.17% |
Egg Plant Semi gloss
| Soda Feldspar | 46% |
| Flint | 15% |
| Talc | 13% |
| Gerstly Borate | 13% |
| Dolomite | 9% |
| EPK | 4.5% |
| Bentonite | 1% |
| Cobalt Carb. | 2% |
| Manganese Carb. | 5% |
Greens:
Cone 5 oxide Green matte
| Nepheline Syenite | 40 % |
| Wollastonite | 25 % |
| Spodumene | 12 % |
| EPK | 12 % |
| Flint | 11 % |
| Copper carbonate | 4 % |
| Bentonite | 2 % |
"Faux Celadon" Cone 6 oxidation.
| Soda Feldspar | 50.00% |
| Wollastonite | 20.00% |
| China Clay | 10.00% |
| Silica | 10.00% |
| Gerstley Borate | 10.00% |
| Copper Carbonate | 00.50% |
| Black Stain | 00.20% |
*K15 1*
| Nepheline Syenite | 40% |
| Dolomite | 18% |
| Flint | 18% |
| EPK | 12% |
| Bone Ash | 6% |
| Lithium Carbonate | 2% |
| Zinc Oxide | 4% |
| Copper Carbonate | 2% |
Cone 6 oxidation [^7 in sitter] from Clay Times
| Nepheline Syenite | 47.3% |
| Gerstley Borate | 27.0% |
| Silica | 20.3% |
| EPK | 5.4% |
| 100.0% | |
| red iron oxide | 2.0% |
| cobalt oxide | 1.0% |
| Rutile | 4.0% |
| Bentonite | 2.0% |
Whites:
Pearly Cone 6
| K200 Feldspar | 26.3% |
| Flint | 32.69% |
| Whiting | 19.72% |
| EPK | 12.05% |
| Zinc | 6.57% |
| Magnesium Carbonate (light) | 2.66% |
| 100% |
Pike's Oatmeal
| CUSTER FELDSPAR | 2238.00 | 37.34% |
| COLEMANITE | 762.00 | 12.71% |
| DOLOMITE | 384.00 | 6.41% |
| TALC | 816.00 | 13.61% |
| KAOLIN | 270.00 | 4.50% |
| FLINT | 1362.00 | 22.72% |
| ZINC OXIDE | 162.00 | 2.70% |
| 5994.00 | 100% |
White cone 5/6
| Flint | 29% |
| Calcium carbonate | 13% |
| Frit 3134 | 19% |
| Kona F4 | 20% |
| Kaolin | 19% |
| Superpax | 12.5% |
Glaze Name: V.C. Soft White Matt Cone: 5 - 6
Color: Semi Opaque White
Surface: Satin
Firing: Ox or Red
Tested: Untested Glaze Type: Na Li Mid-Road Shino Recipe:
| Nepheline Syenite | 54.00% |
| Barium Carbonate | 9.00% |
| Gerstley Borate | 11.00% |
| Lithium Carbonate | 5.00% |
| Cryolite | 5.00% |
| Zinc Oxide | 2.00% |
| EPK | 11.00% |
| Flint | 3.00% |
| Totals: | 100.00% |
| Tin Oxide | 2.00% |
| Zircopax | 5.00% |
From Val Cushing.
Possible Health Hazards:
Barium Carbonate: HIGHLY Toxic-avoid ingestion. Do not use in glazes intended for use with food. Cryolite: Possibly Toxic - avoid breathing dust. Properly ventilate kilns - releases Fluorine when fired. Flint: free silica-wear a NIOSH approved dust mask when handling dry material
Estimated Thermal Expansion: x10-7
Analyses:
Unity Formula for V.C. Soft White Matt:
| 0.073 K2O | 0.496 Al2O3 | 1.958 SiO2 |
| 0.370 Na2O | 0.129 B2O3 | 0.409 F |
| 0.137 CaO | ||
| 0.031 MgO | ||
| 0.190 Li2O | ||
| 0.129 BaO | ||
| 0.070 ZnO |
Percentage Analysis:
| 46.16 % | SiO2 |
| 19.84 % | Al2O3 |
| 3.52 % | B2O3 |
| 2.70 % | K2O |
| 9.00 % | Na2O |
| 3.01 % | CaO |
| 0.49 % | MgO |
| 2.23 % | Li2O |
| 7.76 % | BaO |
| 2.24 % | ZnO |
| 3.05 % | F |
WAXY WHITE Cone 6
| Wollastonite | 37.2% |
| Silica | 23.5% |
| EPK | 14.9% |
| Nepheline Syenite. | 14.5% |
| Gerstley Borate | 9.9% |
also, add 2% copper carbonate for Waxy Green.
Pinks:PINK-TO-BURGUNDY (^6 OX)
| Gerstley Borate | 20.68% | 1034 |
| Nepheline Syenite | 16.29% | 814 |
| EPK | 11.34% | 567 |
| Whiting | 19.52% | 976 |
| Flint | 32.16 % | 1608 |
| Tin Oxide | 5.00% | 250 |
| Green Chrome Oxide | 0.15% | .15% |
Red/Pink Purple/Mauve ^6
| Gerstley borate | 21 % |
| Nepheline Syenite | 16 % |
| Kaolin | 11 % |
| Whiting | 20 % |
| Silica | 32 % |
| Tin | 5 % |
| Chrome | 0.15% |
Pink Glaze
| Ferro Frit 3134 | 32% |
| Custer feldspar | 23% |
| Flint | 22% |
| EPK | l6% |
| Wollastonite | 7% |
| Mason stain 6020 | 7% |
Mirjana's Pink ^6
| Strontium Carbonate | 2.3 %(instead of barium) |
| Gerstley Borate | 7.4% |
| Lithium Carbonate | 2.3% |
| Magnesium Carbonate | 8.6% |
| Whiting | l6.4% |
| Nepheline Syenite | 27.3% |
| Flint | 35.7% |
| Tin oxide | 3.5% |
| Rutile | 3.0% |
Cone 6 Pink
| Gerstley Borate | 21% |
| Nepheline Syenite | 16% |
| Kaolin | 11% |
| Whiting | 20% |
| Silica | 32% |
| Tin Oxide | 5% |
| Chromium Oxide | 0.15% |
Browns:
Chocolate cone 4-5
| Gerstley Borate | 54.88% |
| Talc | 14.63% |
| Flint | 30.49% |
| RIO | 21.95% |
Carmel Corn
| Gerstley Borate | 51.0% |
| Silica | 31.0% |
| EPK | 16.0% |
| Custer | 3.0% |
| Bentonite | 1.0% |
| CMC | 1 tsp. |
| Manganese Dioxide | 10.0% |
| Rutile | 5.0% |
Strangely named glazes that I collected, but never tested.
Bright Glaze C/6
| Volcanic Ash | 62.3% |
| Frit 54 | 28.3% |
| China Clay | 9.4% |
GDR6 Cone 6 Oxidation
| G200 or Custer Spar | 32.00% |
| Whiting | 14.00 % |
| Talc | 6.0 % |
| Frit 3134 | 6.0 % |
| Ball clay (OM#4) | 17.0 % |
| Silica | 25.0 % |
| Total | 100.0% |