Category: Glaze > Blue > Cobalt
Created 2017-10-07 12:01:58 by Dan Lizotte
Categories: Glaze > Blue > Cobalt
Firing Temperature: Δ6
Atmospheres: Oxidation
Surface Type: Matte - Semi
Transparency: Semi-opaque

Approximate re-formulation of MC6G High Calcium Semimatte 2 + 1 Mason #6388 Mazerine + 5 Rutile using only EPK, Wollastonite, Frit 3134, Silica. Used stain (cobalt silicate) because it was cheaper than cobalt carbonate. Fired in a manual electric kiln (vintage Duncan) with slow cool. Left at "medium" for 3 hours following main firing.

Material Amount Batch Subtotal
EPK 38.47
Frit 3134 21.74
Vansil W-30 Wollastonite 21.09
Silica 18.7
Total Base:100
Rutile 5
Mason stain 1
Total: 106

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO K2O Na2O KNaO P2O5 Fe2O3 TiO2 MnO LOI
EPK38.4717.5914.370.040.070.130.030.160.10.290.155.7
Frit 313421.7410.115.024.382.232.23
Vansil W-30 Wollastonite21.0910.550.150.329.490.020.020.040.020.34
Silica18.718.7
Rutile50.494.50.01
Mason stain1
Total10656.9514.525.020.3613.940.132.282.410.10.834.650.026.04
100% no LOI 57.6414.75.080.3614.110.132.312.440.10.844.70.02

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.12 Na2O
0.84 CaO
0.03 MgO
STABILIZERS

R2O3

0.48 Al2O3
0.24 B2O3
GLASS-FORMERS

RO2

3.2 SiO2
0.2 TiO2
OTHER

 

0.02 Fe2O3
SILICA:ALUMINA

SiO2:Al2O3

6.66

FLUX RATIO

R2O:RO

0.13 : 0.87

SiO2:Al2O3 Chart

Closest 85 neighbors in Glaze > Blue > Cobalt.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 6.66

Similar Base Recipes

Similar RO/R2O Unity Formulas

R2O3 - STABILIZERS RO2 - GLASS FORMERS RO/R2O - FLUXES
Recipe Name ΔTemp Al2O3 B2O3 SiO2 ZrO2 SnO2 TiO2 KNaO K2O Na2O CaO MgO ZnO BaO PbO Li2O SrO
Cretaceous Blue 6 0.48 0.24 3.2 0.2 0.12 0.12 0.84 0.03
Jurassic Green 6 0.48 0.24 3.2 0.23 0.12 0.12 0.84 0.03

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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
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
exposure.
1 0 0 E
Vansil W-30 Wollastonite Health Hazard DANGER May cause cancer if inhaled.
Causes damage to organs through prolonged or repeated exposure if inhaled. (respiratory tract)
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
Rutile 1 0 0