Category: Slip & Engobe > Slip
Created 2000-01-01 00:00:00 by Glazy Admin
Categories: Slip & Engobe > Slip
Firing Temperature: Δ10
Atmospheres: Oxidation, Reduction

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 slip
Testing: Tested
Surface texture: Slip or Engobe
Firing: Ox. or Red.
Glaze type: Slip
Recipe: Percent Batch
Kaolin 18.75 1500
Ball Clay 18.75 1500
Calcined Kaolin 25.00 2000
Custer Feldspar 25.00 2000
Ultrox 6.25 500
Borax 6.25 500
Totals: 100.00 % 8000 gm
not a glaze This is a slip for bisqueware. Nice under Korean, use a thin wash under shino for whiter results. So long as a glaze fires smooth over this slip it does not effect the glazes status.

Material Amount Batch Subtotal
Calcined Kaolin 25
Custer Feldspar (1989) 25
Kaolin (Theoretical) 18.75
Ball Clay (Theoretical) 18.75
Ultrox 6.25
Borax 6.25
Total: 100

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO K2O Na2O KNaO Fe2O3 TiO2 ZrO2 LOI
Calcined Kaolin2513.5211.48
Custer Feldspar (1989)2517.164.350.082.590.763.350.08
Kaolin (Theoretical)18.758.877.542.34
Ball Clay (Theoretical)18.7511.074.690.
100% no LOI 57.1730.372.470.060.142.9924.980.210.24.4

Similar RO/R2O Unity Formulas

Recipe Name ΔTemp Al2O3 B2O3 SiO2 ZrO2 SnO2 TiO2 KNaO K2O Na2O CaO MgO ZnO BaO PbO Li2O SrO
Oestrich Bisque Crackle Slip 10 4.38 0.52 14 0.53 0.04 0.94 0.47 0.47 0.04 0.02
Oestrich Bisque Crackle Slip With Colors 10 4.38 0.52 14 0.53 0.04 0.94 0.47 0.47 0.04 0.02
louis katz 2017-04-07 02:31:34
This is a standard at my school. I have used it since the 70's. You can get to thick a coat and it will come off, but a nice coat will give a mild number of cracks and holes, and without glaze usually some borax spots. It goes on bisque. But it will work as a slip for wet clay too.


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
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
Borax 1 0 0 *