Category: Glaze > Majolica
Created 2000-01-01 00:00:00 by Glazy Admin
Categories: Glaze > Majolica
Firing Temperature: Δ10
Atmospheres: Reduction
Surface Type: Glossy

This recipe was imported from Louis Katz's Hyperglaze database available on his website:
More information about Louis Katz can be found on his website,

Louis Katz Notes: I am not a safety expert and any information contained in this file about safety should be ignored in favor of advice from experts. All of the materials in all glazes are potentially hazardous. All of these glaze recipes are given without any representation of accuracy or safety. They may work, they may not. They may be safe when fired or they may not. All of the materials used in them have hazards associated with them. You must be have sufficient training in the hazards before you use the the materials. You will have to determine the suitability and safety for your use. Do not assume that a lack of a warning about a material means that it is safe.

Cone: 10
Color: white
Testing: Tested
Surface texture: Shiny or Glossy
Firing: Reduction
Glaze type: Majolica
Recipe: Percent Batch
Strontium Carbonate 2.01 402
whiting 12.56 2512
Zinc Oxide 2.01 402
Minspar 200 52.56 10512
Ultrox 9.15 1830
Flint 21.71 4342
Totals: 100.00 % 20000 Gm
Also add:
Bentonite 2.00 400
Add 1.00Tablespoon of Magnesium Sulfate to a 20,000 gram batch. Make sure to dissolve in water first.
Minspar is a soda feldspar

Material Amount Batch Subtotal
Minspar 200 52.56
Silica 21.71
Whiting 12.56
Ultrox 9.15
Strontium Carbonate 2.01
Zinc Oxide 2.01
Total Base:100
Bentonite 2
Total: 102

Percentage Analysis

Ingredient Amount SiO2 Al2O3 MgO CaO SrO ZnO K2O Na2O KNaO Fe2O3 ZrO2 LOI
Minspar 20052.5636.229.770.792.163.435.590.030.16
Strontium Carbonate2.011.410.6
Zinc Oxide2.012.01
100% no LOI 65.2310.640.048.231.482.12.293.665.940.116.23

Unity Molecular Formula (UMF)



0.22 Na2O
0.09 K2O
0.05 SrO
0.1 ZnO
0.54 CaO


0.39 Al2O3


4 SiO2
0.19 ZrO2





0.31 : 0.69

SiO2:Al2O3 Chart

Closest 85 neighbors in Glaze > Majolica.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 10.4

Similar Base Recipes

No recipes with similar base ingredients and amounts were found.

Similar RO/R2O Unity Formulas

No recipes with similar RO/R2O Unity Formulas were found.

louis katz 2017-04-07 02:41:09
I like this glaze. It does not like hard water however, or being fired wet. It is a bit powdery. It does take decoration well.


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
Minspar 200 Health Hazard WARNING May cause damage to lung through prolonged or repeated inhalation 2 0 0 E
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
Whiting Harmful WARNING Causes eye irritation
Strontium Carbonate Harmful WARNING Product dust may be irritating to eyes,skin and respiratory system.  1 0 0 E
Zinc Oxide 0 0 0 *
Bentonite Harmful WARNING Causes eye irritation
Causes skin irritation
May cause respiratory irritation