Category: Glaze > Iron
Created 2017-11-17 20:22:30 by Ginger Lukas
Categories: Glaze > Iron
Firing Temperature: Δ6
Atmospheres: Oxidation
Surface Type: Glossy - Semi
Transparency: Semi-opaque

Material Amount Batch Subtotal
Volcanic ash - Great Plains 48.7
Barnard Clay 13.04
Wollastonite (Theoretical) 12.17
Kentucky OM #4 Ball Clay 10.43
Gerstley Borate 8.7
Silica 6.96
Cobalt Carbonate 0.22
Total: 100.22

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO K2O Na2O KNaO P2O5 Fe2O3 TiO2 CoO LOI
Volcanic ash - Great Plains48.735.315.620.030.333.820.874.690.050.580.26
Barnard Clay13.046.130.990.
Wollastonite (Theoretical)
Kentucky OM #4 Ball Clay10.435.762.910.
Gerstley Borate8.
Cobalt Carbonate0.220.140.08
100% no LOI 66.1310.32.50.518.574.391.425.820.065.520.450.15

Unity Molecular Formula (UMF)



0.1 Na2O
0.2 K2O
0.64 CaO
0.05 MgO


0.43 Al2O3
0.15 B2O3


4.74 SiO2
0.02 TiO2


0.15 Fe2O3
0.01 CoO





0.3 : 0.7

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze > Iron.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 10.89

Similar Base Recipes

No recipes with similar base ingredients and amounts were found.

Similar RO/R2O Unity Formulas

No recipes with similar RO/R2O Unity Formulas were found.

Reinhard Lieckefett 2017-11-29 08:06:13
Really cobalt, not copper?


09/2016 Note: This is a new feature. If a recipe material is not listed, that material's data has not yet been added. Some materials only have GHS ratings, while others only have HMIS ratings. Warnings differ between systems and countries. Glazy does not take any responsibility for accuracy of linked SDS information. Contact your ceramics supplier for safety information for your specific materials.
Globally Harmonized System (GHS) Hazardous Materials Identification System (HMIS) SDS Link
Material Pictograms Signal Word Hazard Statements Health Flammability Hazard Protection
Wollastonite (Theoretical) Health Hazard DANGER Vansil W-30 Wollastonite SDS:
May cause cancer if inhaled.
Causes damage to organs through prolonged or repeated exposure if inhaled. (respiratory tract)
Kentucky OM #4 Ball Clay Health Hazard WARNING May cause damage to lung through prolonged or repeated inhalation 2 0 0 E
Gerstley Borate
Silica HarmfulHealth Hazard DANGER From 200-Mesh SDS:
May cause cancer by inhalation.
Causes damage to lungs through prolonged or repeated exposure by inhalation.
* 0 0 E
Cobalt Carbonate Health HazardEnvironmental Hazard DANGER May cause cancer
Suspected of causing genetic effects
May damage fertility or the unborn child
May cause allergy or breathing difficulties if inhaled
May cause a allergic skin reaction
Very toxic to aquatic life
Very toxic to aquatic life with long lasting effects
2 0 0 *