Category: Glaze > Crystalline
Created 2016-02-11 11:54:06 by Lasse Östman
Categories: Glaze > Crystalline
Firing Temperature: Δ8
Atmospheres: Oxidation
Transparency: Opaque

One of my most popular crystal glazes based on zinc and lithium. Too thick it will run a lot, but it can be controlled very exactly after a few tests. Always spray the glaze thinner near the bottom of the pot. 1260oC with 1/2 to one hour at the top temperature. Does not need a slow cooling. You can also try other combinations of coloring oxides.

http://www.stoneware.net/stoneware/glasyrer/recept/crystal/6713-8.htm

Material Amount Batch Subtotal
Silica 32.2
NR Potassium Feldspar 27.6
Zinc Oxide 18.7
Lithium Carbonate 6.82
Barium Carbonate 4.44
Rutile 4.01
Dolomite 3.48
Kaolin (Theoretical) 2.75
Cobalt Oxide 1.06
Total: 101.06

Percentage Analysis

Ingredient Amount SiO2 Al2O3 MgO CaO BaO ZnO Li2O K2O Na2O KNaO Fe2O3 TiO2 CoO LOI
Silica32.232.2
NR Potassium Feldspar27.618.595.060.042.960.953.91
Zinc Oxide18.718.7
Lithium Carbonate6.822.784.04
Barium Carbonate4.443.450.99
Rutile4.010.43.61
Dolomite3.480.761.061.66
Kaolin (Theoretical)2.751.31.110.34
Cobalt Oxide1.060.990.07
Total101.0652.16.160.81.063.4518.72.782.960.953.910.43.610.997.11
100% no LOI 55.456.560.851.133.6719.92.963.161.014.160.423.841.05

Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.04 Na2O
0.07 K2O
0.22 Li2O
0.05 BaO
0.53 ZnO
0.04 CaO
0.05 MgO
STABILIZERS

R2O3

0.14 Al2O3
GLASS-FORMERS

RO2

2.01 SiO2
0.1 TiO2
OTHER

 

0.01 Fe2O3
0.03 CoO
SILICA:ALUMINA

SiO2:Al2O3

14.35

FLUX RATIO

R2O:RO

0.32 : 0.68

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze > Crystalline.

Click and drag to zoom
Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 14.35

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
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
6713/35 Glossy orange yellow 8 0.14 1.96 0.05 0.1 0.07 0.03 0.04 0.04 0.52 0.05 0.23
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
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
kenneth ibbett 2016-12-29 13:00:40
I found this very runny , works well on porcelain, needs a nappy and I am now leaving an inch clear

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
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 *
Rutile 1 0 0
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
exposure.
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 *