Category: Glaze > Blue > Cobalt
Created 2016-12-01 10:46:26 by Pia Schmaltz
Categories: Glaze > Blue > Cobalt
Firing Temperature: Δ5-7
Atmospheres: Oxidation
Surface Type: Matte
Transparency: Opaque

Matte variable green-blue, blue-green
Variations:
Yellow green: 1% Cobalt Oxide, 4% Rutile
Forest green: 1,75% Cobalt Oxide, 2% Rutile
Blue green: 1% Cobalt Oxide, 0,5% Rutile
On white stoneware clay.
The original recipe with Ball Clay makes it darker.

Emmanuel Cooper nr 259

Material Amount Batch Subtotal
Nepheline Syenite (Theoretical) 50
Kaolin (Theoretical) 20
Whiting 15
Cornwall Stone 12
Zinc Oxide 3
Total Base:100
Rutile 4
Cobalt Oxide 1
Total: 105

Percentage Analysis

Ingredient Amount SiO2 Al2O3 MgO CaO ZnO K2O Na2O KNaO Fe2O3 TiO2 CoO LOI
Nepheline Syenite (Theoretical)5030.3511.650.050.352.34.97.20.050.35
Kaolin (Theoretical)209.468.042.5
Whiting158.426.59
Cornwall Stone128.851.960.020.220.520.40.920.020.02
Zinc Oxide33
Rutile40.43.6
Cobalt Oxide10.930.07
Total10548.6621.650.078.9832.825.38.110.473.620.939.51
100% no LOI 50.9622.670.079.413.142.955.558.490.493.790.98

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.27 Na2O
0.1 K2O
0.12 ZnO
0.51 CaO
0.01 MgO
STABILIZERS

R2O3

0.68 Al2O3
GLASS-FORMERS

RO2

2.58 SiO2
0.14 TiO2
OTHER

 

0.01 Fe2O3
0.04 CoO
SILICA:ALUMINA

SiO2:Al2O3

3.81

FLUX RATIO

R2O:RO

0.37 : 0.63

SiO2:Al2O3 Chart

Closest 90 neighbors in Glaze > Blue > Cobalt.

Click and drag to zoom
Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 3.81

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.

No reviews yet.

Hazards

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
Kaolin (Theoretical) HarmfulHealth Hazard DANGER SDS for EPK KAOLIN: 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
exposure.
Whiting Harmful WARNING Causes eye irritation
Zinc Oxide 0 0 0 *
Rutile 1 0 0
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 *