Category: Glaze > Iron > Tenmoku, Temmoku
Created 2017-10-28 05:57:58 by Sid Henderson
Categories: Glaze > Iron > Tenmoku, Temmoku
Firing Temperature: Δ9-10
Atmospheres: Reduction
Surface Type: Glossy
Transparency: Translucent

This glaze was inspired by a similar temmoku a friend showed me.

Using Turner's Celadon as a base (found in John Britt's Cone 10 glaze book) I increased the iron content to turn it into a temmoku.

I also slightly tweaked the wood ash and clay to make it slightly more fluid.

The result is a temmoku that, instead of rusting at the rim, breaks amber. Its half-way between a black celadon and a typical rusty temmoku.

Material Amount Batch Subtotal
Silica 30.7
Custer Feldspar 25.5
Whiting 19.3
Kentucky OM #4 Ball Clay 10
EPK 9.5
Mixed wood ash 5
Total Base:100
Red iron oxide 9
Bentonite 2
Total: 111

Percentage Analysis

Ingredient Amount SiO2 Al2O3 MgO CaO K2O Na2O KNaO P2O5 Fe2O3 TiO2 LOI
Custer Feldspar25.517.474.340.082.550.773.320.030.08
Kentucky OM #4 Ball Clay105.522.790.
Mixed wood ash50.990.070.331.041.10.341.440.680.44
Red iron oxide98.550.45
100% no LOI 60.8611.270.4312.143.851.225.060.719.360.16

Unity Molecular Formula (UMF)



0.07 Na2O
0.14 K2O
0.75 CaO
0.04 MgO


0.39 Al2O3


3.53 SiO2
0.01 TiO2


0.2 Fe2O3
0.02 P2O5





0.21 : 0.79

SiO2:Al2O3 Chart

Closest 80 neighbors in Glaze > Iron > Tenmoku, Temmoku.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 9.16

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
Tiger Eye Temmoku 9-10 0.39 3.53 0.01 0.21 0.14 0.07 0.75 0.04
Celadon from Tichane-inspired triaxial 10-11 0.36 3.49 0.24 0.24 0.71 0.05
Celadon from Tichane-inspired triaxial (variation) 10-11 0.36 3.49 0.02 0.24 0.24 0.71 0.05
Steven Hill Clear 10 0.42 0.01 3.54 0.25 0.15 0.1 0.74 0.01
Leach 4321 Celadon +1 Zinc Oxide 10 0.39 3.55 0.25 0.25 0.7 0.04

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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
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.
Whiting Harmful WARNING Causes eye irritation
Kentucky OM #4 Ball Clay Health Hazard WARNING May cause damage to lung through prolonged or repeated inhalation 2 0 0 E
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
1 0 0 E
Red iron oxide Health Hazard WARNING May cause damage to lung through prolonged or repeated exposure by inhalation
Bentonite Harmful WARNING Causes eye irritation
Causes skin irritation
May cause respiratory irritation