Category: Glaze > Green > Chrome
Created 2017-01-17 17:14:23 by Tamas Ferencz
Categories: Glaze > Green > Chrome
Firing Temperature: Δ5½-7
Atmospheres: Oxidation, Neutral
Surface Type: Glossy - Semi
Transparency: Semi-opaque

An adaptation of a cone 10 recipe I found online, probably originated from Ceramics Monthly. The original called for pearl ash (potassium carbonate), which I omitted, and added Ferro Frit 3110 to bring it down to mid-range and add the alkali.
Shows a good variability, from a matte chartreuse where thin to a dark glossy-mossy green where thick. Slight crazing on stoneware where thick. Pleasant feel. Fired in electric, slow cooling.

Material Amount Batch Subtotal
Nepheline Syenite (Theoretical) 32
Frit 3110 22.5
EPK 19
Whiting 13
Gillespie Borate 9.5
Potash Feldspar (Theoretical) 4
Total Base:100
Red iron oxide 4.5
Cobalt Carbonate 0.1
Chrome Oxide 0.1
Total: 104.7

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO SrO K2O Na2O KNaO P2O5 Fe2O3 TiO2 CoO Cr2O3 LOI
Nepheline Syenite (Theoretical)3219.427.460.030.221.473.144.610.030.22
Frit 311022.515.051.360.651.270.783.44.18
EPK198.697.10.020.040.070.010.080.050.140.072.81
Whiting137.295.71
Gillespie Borate9.51.120.162.330.372.180.040.360.362.94
Potash Feldspar (Theoretical)42.590.730.680.68
Red iron oxide4.54.280.23
Cobalt Carbonate0.10.060.04
Chrome Oxide0.10.1
Total104.746.8716.82.980.4211.010.042.996.919.90.054.450.070.060.111.94
100% no LOI 50.5318.123.210.4511.870.053.227.4510.670.054.80.080.070.11

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.32 Na2O
0.09 K2O
0.56 CaO
0.03 MgO
STABILIZERS

R2O3

0.47 Al2O3
0.12 B2O3
GLASS-FORMERS

RO2

2.23 SiO2
OTHER

 

0.08 Fe2O3
SILICA:ALUMINA

SiO2:Al2O3

4.73

FLUX RATIO

R2O:RO

0.41 : 0.59

SiO2:Al2O3 Chart

Closest 26 neighbors in Glaze > Green > Chrome.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 4.73

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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
Whiting Harmful WARNING Causes eye irritation
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 *
Chrome Oxide WARNING May be harmful if inhaled. May cause
irritation to eyes and respiratory tract. Slightly toxic if ingested.
2 0 1 E