Category: Glaze
Created 2017-09-04 03:45:34 by Sue McLeod
Categories: Glaze
Firing Temperature: Δ6
Atmospheres: Oxidation
Surface Type: Glossy
Transparency: Opaque

Cedar Hill Studio old Lavender recipe. Recipe was copied down wrong. Missing a few ingredients. Used for 2 years before realizing. Bubbles and blisters with certain other glazes over top.

Material Amount Batch Subtotal
Silica 46.97
Gerstley Borate 33.51
Nepheline Syenite (Theoretical) 19.52
Total Base:100
Cobalt Carbonate 2
Total: 102

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO K2O Na2O KNaO P2O5 Fe2O3 TiO2 CoO LOI
Gerstley Borate33.514.960.348.981.
Nepheline Syenite (Theoretical)19.5211.854.550.
Cobalt Carbonate21.260.74
100% no LOI 69.95.359.841.317.271.133.574.

Unity Molecular Formula (UMF)



0.25 Na2O
0.05 K2O
0.56 CaO
0.14 MgO


0.23 Al2O3
0.61 B2O3


5.02 SiO2


0.08 CoO





0.3 : 0.7

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze.

Click and drag to zoom
Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 22.16

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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
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
Gerstley Borate
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 *