Category: Glaze > Green
Created 2016-03-05 15:27:07 by Daniel Spruyt
Categories: Glaze > Green
Firing Temperature: Δ6
Atmospheres: Oxidation
Surface Type: Glossy
Transparency: Translucent

Green/grey
Source: TRIANGLE POTTERS' GUILD GLAZE RECIPES November, 1988

Tested March 2016. Not a blue as mentioned by the source, but with my materials a green/grey semi-opaque, somewhat speckled.
Has potential on white clays.

Material Amount Batch Subtotal
Potash Feldspar (Theoretical) 42.4
Gerstley Borate 24.2
Silica 19.2
Zinc Oxide 9.1
Kaolin (Theoretical) 5.1
Total Base:100
Red iron oxide 2
Cobalt Carbonate 0.5
Total: 102.5

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO ZnO K2O Na2O KNaO P2O5 Fe2O3 TiO2 CoO LOI
Potash Feldspar (Theoretical)42.427.467.777.177.17
Gerstley Borate24.23.580.246.490.854.690.10.971.070.020.10.027.14
Silica19.219.2
Zinc Oxide9.19.1
Kaolin (Theoretical)5.12.412.050.64
Red iron oxide21.90.1
Cobalt Carbonate0.50.320.19
Total102.552.6510.066.490.854.699.17.270.978.240.0220.020.328.06
100% no LOI 55.7510.656.870.94.979.647.71.038.720.032.110.030.33

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.05 Na2O
0.25 K2O
0.36 ZnO
0.27 CaO
0.07 MgO
STABILIZERS

R2O3

0.32 Al2O3
0.3 B2O3
GLASS-FORMERS

RO2

2.83 SiO2
OTHER

 

0.04 Fe2O3
0.01 CoO
SILICA:ALUMINA

SiO2:Al2O3

8.88

FLUX RATIO

R2O:RO

0.3 : 0.7

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze > Green.

Click and drag to zoom
Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 8.88

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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
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
Zinc Oxide 0 0 0 *
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.
Red iron oxide Health Hazard WARNING May cause damage to lung through prolonged or repeated exposure by inhalation
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 *