Category: Glaze > Crystalline > Manganese
Created 2017-10-10 23:48:28 by Ken Potter
Categories: Glaze > Crystalline > Manganese
Firing Temperature: Δ10
Atmospheres: Oxidation, Neutral, Reduction
Surface Type: Glossy
Transparency: Opaque

This glaze comes from John Conrad. Get the story here:
http://www.alliedcraftsmen.org/documents/John_Conrad-Ceramics_Art_and_Perception.pdf

Material Amount Batch Subtotal
Custer Feldspar 62
Manganese Dioxide 19
Silica 9
EPK 5
Whiting 2
Talc (Theoretical) 2
Bentonite 2
Total: 101

Percentage Analysis

Ingredient Amount SiO2 Al2O3 MgO CaO K2O Na2O KNaO P2O5 Fe2O3 TiO2 MnO2 LOI
Custer Feldspar6242.4710.540.196.21.868.060.060.19
Manganese Dioxide1916.512.49
Silica99
EPK52.291.870.010.010.020.020.010.040.020.74
Whiting21.120.88
Talc (Theoretical)21.270.640.1
Bentonite21.190.40.040.020.020.060.080.070.2
Total10156.2112.810.681.346.241.928.160.010.170.0216.514.59
100% no LOI 58.613.360.711.396.52.018.510.010.180.0217.21

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.23 Na2O
0.48 K2O
0.17 CaO
0.12 MgO
STABILIZERS

R2O3

0.91 Al2O3
GLASS-FORMERS

RO2

6.78 SiO2
OTHER

 

0.01 Fe2O3
1.37 MnO2
SILICA:ALUMINA

SiO2:Al2O3

7.44

FLUX RATIO

R2O:RO

0.71 : 0.29

SiO2:Al2O3 Chart

Closest 6 neighbors in Glaze > Crystalline > Manganese.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 7.44

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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
Custer Feldspar HarmfulHealth Hazard WARNING May cause damage to lungs through prolonged or repeated inhalation.
Suspected of causing cancer through
prolonged or repeated inhalation.
May cause allergy or asthma symptoms or breathing difficulties if inhaled.
May cause skin or eye irritation.
Manganese Dioxide Harmful WARNING Harmful if swallowed. Causes serious eye irritation. Harmful if inhaled. May cause respiratory
irritation.
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
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
Talc (Theoretical) Harmful WARNING Causes mild skin irritation
Harmful if inhaled
May cause respiratory irritation
1 0 0 E
Bentonite Harmful WARNING Causes eye irritation
Causes skin irritation
May cause respiratory irritation