Category: Glaze
Created 2017-09-05 02:01:24 by Sue McLeod
Categories: Glaze
Firing Temperature: Δ6
Atmospheres: Oxidation
Surface Type: Matte
Transparency: Opaque

Cedar Hill Studio old Black Matte recipe. Underfired at cone 6. Reformulated and replaced with Black Velvet.

Material Amount Batch Subtotal
Custer Feldspar 49.2
EPK 19.9
Whiting 17.9
Zinc Oxide 8
Silica 5
Total Base:100
Red iron oxide 6.7
Cobalt Oxide 1.3
Total: 108

Percentage Analysis

Ingredient Amount SiO2 Al2O3 MgO CaO ZnO K2O Na2O KNaO P2O5 Fe2O3 TiO2 CoO LOI
Custer Feldspar49.233.78.360.154.921.486.40.050.15
EPK19.99.17.430.020.040.070.010.080.050.150.082.95
Whiting17.910.047.86
Zinc Oxide88
Silica55
Red iron oxide6.76.370.34
Cobalt Oxide1.31.210.09
Total10847.815.80.0210.2384.991.496.480.056.570.081.2111.37
100% no LOI 49.6716.420.0210.638.315.181.556.730.056.820.081.26

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.07 Na2O
0.15 K2O
0.27 ZnO
0.51 CaO
STABILIZERS

R2O3

0.43 Al2O3
GLASS-FORMERS

RO2

2.23 SiO2
OTHER

 

0.11 Fe2O3
0.05 CoO
SILICA:ALUMINA

SiO2:Al2O3

5.14

FLUX RATIO

R2O:RO

0.22 : 0.78

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 5.14

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
Black Matte -old (Cedar Hill) 6 0.43 2.23 0.22 0.15 0.07 0.51 0.27
Matte Black (similar to Rudy's Black) 6 0.43 2.23 0.22 0.15 0.07 0.51 0.27

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