Category: Glaze > Crystalline
Created 2016-02-11 12:13:02 by Lasse Östman
Categories: Glaze > Crystalline
Firing Temperature: Δ8
Atmospheres: Oxidation
Transparency: Opaque

A popular crystal glaze based on zinc and lithium. Too thick it will run a lot. Spray the glaze thinner near the bottom of the pot. 1260oC with 3/4 to one hour at the top temperature. Does not need a slow cooling. Also try with 2% stannic oxide.

Material Amount Batch Subtotal
Silica 34
NR Potassium Feldspar 28.5
Zinc Oxide 19
Lithium Carbonate 7.34
Barium Carbonate 4.35
Dolomite 3.53
Kaolin (Theoretical) 3.26
Rutile 2.17
Copper Oxide 1.09
Cobalt Carbonate 0.19
Total: 103.43

Percentage Analysis

Ingredient Amount SiO2 Al2O3 MgO CaO BaO ZnO Li2O K2O Na2O KNaO Fe2O3 TiO2 CoO CuO LOI
NR Potassium Feldspar28.519.
Zinc Oxide1919
Lithium Carbonate7.342.994.35
Barium Carbonate4.353.380.97
Kaolin (Theoretical)3.261.541.310.41
Copper Oxide1.091.09
Cobalt Carbonate0.190.120.07
100% no LOI 57.056.810.851.123.5219.

Unity Molecular Formula (UMF)



0.04 Na2O
0.07 K2O
0.23 Li2O
0.05 BaO
0.53 ZnO
0.04 CaO
0.05 MgO


0.14 Al2O3


2.06 SiO2
0.06 TiO2


0.03 CuO





0.33 : 0.67

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze > Crystalline.

Click and drag to zoom
Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 14.22

Similar Base Recipes

No recipes with similar base ingredients and amounts were found.

Similar RO/R2O Unity Formulas

Recipe Name ΔTemp Al2O3 B2O3 SiO2 ZrO2 SnO2 TiO2 KNaO K2O Na2O CaO MgO ZnO BaO PbO Li2O SrO
6713/58 Glossy light to turquoise blue 8 0.14 2.06 0.06 0.11 0.07 0.04 0.04 0.05 0.53 0.05 0.23
6713/8 Glossy yellowish with blue crystals 8 0.14 2.01 0.1 0.11 0.07 0.04 0.04 0.05 0.53 0.05 0.22
Glossy Yellow with Blue Crystals 6 0.13 2.05 0.11 0.1 0.07 0.03 0.05 0.04 0.54 0.05 0.22

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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
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
Zinc Oxide 0 0 0 *
Lithium Carbonate Harmful WARNING Harmful if swallowed.
Causes serious eye irritation.
Harmful to aquatic life.
Barium Carbonate Harmful WARNING Harmful if swallowed. 2 0 1 *
Dolomite Health Hazard DANGER May cause cancer (Inhalation) 1 0 0 E
Kaolin (Theoretical) HarmfulHealth Hazard DANGER SDS for EPK KAOLIN: 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
Rutile 1 0 0
Copper Oxide Harmful WARNING Harmful if swallowed 2 0 0 E
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 *