Category: Glaze > Raku
Created -0001-11-30 00:00:00 by Glazy Admin
Categories: Glaze > Raku
Firing Temperature: Δ05½-04
Atmospheres: Raku
Transparency: Opaque

Glaze Type: Raku (Copper luster)

From Clay Times article v.6 no.6 Nov/Dec.2000, p24. Marcia Selsor recipe.
Fire til smooth. Reduce.

Material Amount Batch Subtotal
Gerstley Borate 80
Bone Ash 20
Total Base:100
Copper Carbonate 5
Cobalt Oxide 2
Total: 107

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO K2O Na2O KNaO P2O5 Fe2O3 TiO2 CoO CuO LOI
Gerstley Borate8011.840.821.442.815.520.323.23.520.080.320.0823.6
Bone Ash2011.168.480.36
Copper Carbonate53.221.78
Cobalt Oxide21.870.13
Total10711.840.821.442.826.680.323.23.528.560.320.081.873.2225.87
100% no LOI 14.590.9926.433.4532.890.43.944.3410.550.390.12.33.97

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.09 Na2O
0.01 K2O
0.79 CaO
0.12 MgO
STABILIZERS

R2O3

0.01 Al2O3
0.51 B2O3
GLASS-FORMERS

RO2

0.33 SiO2
OTHER

 

0.1 P2O5
0.04 CoO
0.07 CuO
SILICA:ALUMINA

SiO2:Al2O3

25.06

FLUX RATIO

R2O:RO

0.09 : 0.91

SiO2:Al2O3 Chart

Closest 65 neighbors in Glaze > Raku.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 25.06

Similar Base Recipes

Δ04 - 03
Δ05½ - 01

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
Alligator Raku 05½-04 0.01 0.51 0.33 0.1 0.01 0.09 0.79 0.12
Copper Sand Modified 08-05½ 0.01 0.46 0.3 0.09 0.01 0.08 0.81 0.1
Blue Hawaiian Copper 05½ 0.01 0.51 0.33 0.01 0.1 0.01 0.09 0.79 0.12
Copper Multi Colored Sand Patina 08-05½ 0.01 0.51 0.33 0.1 0.01 0.09 0.79 0.12

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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
Bone Ash
Copper Carbonate Harmful WARNING Harmful if swallowed.
Causes skin irritation.
Causes serious eye irritation.
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 *