Category: Glaze > Blue
Created 2015-10-20 01:54:39 by Terry Rorison
Categories: Glaze > Blue
Firing Temperature: Δ6
Atmospheres: Oxidation
Surface Type: Satin
Transparency: Translucent
Material Amount Batch Subtotal
Minspar 200 48
Silica 21
Gillespie Borate 8
Whiting 7
Zinc Oxide 5
Talc (Theoretical) 2
Total Base:100
Cobalt Oxide 2
Bentonite 2
Total: 104

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO SrO ZnO K2O Na2O KNaO P2O5 Fe2O3 TiO2 CoO LOI
Minspar 2004833.078.920.721.983.
Gillespie Borate80.940.141.960.311.840.
Zinc Oxide55
Talc (Theoretical)21.270.640.1
Cobalt Oxide21.870.13
100% no LOI 63.7913.

Unity Molecular Formula (UMF)



0.2 Na2O
0.08 K2O
0.22 ZnO
0.41 CaO
0.09 MgO


0.45 Al2O3
0.1 B2O3


3.65 SiO2


0.09 CoO





0.28 : 0.72

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze > Blue.

Click and drag to zoom
Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 8.15

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.

Alexandra FitzGerald 2016-10-12 15:37:27
This came out very speckled for me. It also wasn't as smooth and glassy as I had expected, though this may have been due to some weird stuff happening in my firing. I'm going to remix and also substitute Cobalt Carb. for the Cobalt Ox. since the CO is what tends to turn speckled.


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
Minspar 200 Health Hazard WARNING May cause damage to lung through prolonged or repeated inhalation 2 0 0 E
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
EPK HarmfulHealth Hazard DANGER EPK Kaolin is a naturally occurring mineral, which may contain amounts of crystalline silica
typically 0.1-1.0%, may cause damage to respiratory system through prolonged or repeated
1 0 0 E
Whiting Harmful WARNING Causes eye irritation
Zinc Oxide 0 0 0 *
Talc (Theoretical) Harmful WARNING Causes mild skin irritation
Harmful if inhaled
May cause respiratory irritation
1 0 0 E
Cobalt Oxide HarmfulHealth Hazard WARNING Suspected of causing cancer
Harmful if swallowed
May cause allergy or breathing difficulties if inhaled
May cause an allergic skin reaction
2 0 0 *
Bentonite Harmful WARNING Causes eye irritation
Causes skin irritation
May cause respiratory irritation