Information

The recipes of the glazes posted here are the results of a research project conducted 15 years ago by my friend Bernard Brunette and I.
Les recettes des glaçures publiées ici sont les résultats d'un projet de recherche mené il y a 15 ans par mon ami Bernard Brunette et moi-même.

Hardwood ash was used, it was washed 5 times and 200 mesh-sieved.
De la cendre de bois dur fut utilisée, lavée 5 fois et tamisée à 200 mailles.
We used Ash Berhens for ease of calculating molecular analyses.
Nous avons utilisé Ash Berhens pour faciliter le calcul des analyses moléculaires

Ash Berhens :

Richard Berhens, a famous glaze chemist, proposed a mixture of
raw materials to substitute for wood ash.
Richard Berhens, un célèbre chimiste céramique, a proposé un
mélange de matériaux de base pouvant être un substitut de la
cendre de bois.
This substitution has the following analysis.
Cette substitution a l'analyse suivante :

Na2O 0.01 Al2O3 0.13 SiO2 0.47
K2O 0.04 P2O5 0.07
MgO 0.05 TiO2 0.01
CaO 0.90 Fe2O3 0.02

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Other Cone 04 glaze sites,
Autres sites de glaçures de Cone /04.

http://04glazes.blogspot.com/
http://greenglazes.blogspot.com/

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Recipes for Terra Cotta clays,
Recettes d'argiles Terra Cotta.

http://terracotta04.blogspot.com/

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C/04 Quintessence Textured Glossy Ash Glaze Base #1

Frit 3134 26.5
Frit 3110 26.5
Custer spar 3
Ball clay 26
Ash Berhens 14
Gerstley borate 4

Na2O 0.29 Al2O3 0.25 SiO2 2.14
K2O 0.04 B2O3 0.29 P2O5 0.02
MgO 0.03 TiO2 0.01
CaO 0.64 Fe2O3 0.01

Alumina:Silica ratio is 1.00:8.50
Neutral:Acid ratio is 1.00:4.07
Alk:Neut:Acid ratio is 1.00:0.54:2.19

Expansion: 87.7 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

C/04 Quintessence Ash Glaze Base #2

Frit 3134 26.5
Frit 3110 26.5
Custer feldspar 3
EPK 26
Ash Berhens 14
Gerstley borate 4

Na2O 0.29 Al2O3 0.32 SiO2 2.05
K2O 0.04 B 2O3 0.29 P2O5 0.02
MgO 0.03 TiO2 0.01
CaO 0.64 Fe2O3 0.01

Alumina:Silica ratio is 1.00:6.39
Neutral:Acid ratio is 1.00:3.42
Alk:Neut:Acid ratio is 1.00:0.61:2.08

Expansion: 87.9 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

C/04 Quintessence Ash Glaze Base #3

Frit 3134 53
Custer feldspar 3
Ball clay 26
Ash Berhens 1
Gerstley borate 4

Na2O 0.22 Al2O3 0.21 SiO2 1.73
K2O 0.02 B2O3 0.44 P2O5 0.02
MgO 0.03 TiO2 0.01
CaO 0.73 Fe2O3 0.01

Alumina:Silica ratio is 1.00:8.27
Neutral:Acid ratio is 1.00:2.73
Alk:Neut:Acid ratio is 1.00:0.65:1.77

Expansion: 84.7 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

C/04 Quintessence Ash Glaze Base #4

Frit 3134 66
EPK 19
Ash Berhens 15

Na2O 0.23 Al2O3 0.18 SiO2 1.49
K2O 0.01 B2O3 0.45 P2O5 0.02
MgO 0.02 TiO2 0.00
CaO 0.74 Fe2O3 0.01

Alumina:Silica ratio is 1.00:8.25
Neutral:Acid ratio is 1.00:2.40
Alk:Neut:Acid ratio is 1.00:0.63:1.52

Expansion: 88.3 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

C/04 Quintessence Ash Glaze Base #5

Frit 3134 31
Frit 3110 31
Ash Berhens 17
Ball clay 21

Na2O 0.30 Al2O3 0.20 SiO2 1.97
K2O 0.03 B2O3 0.26 P2O5 0.02
MgO 0.02 TiO2 0.01
CaO 0.65 Fe2O3 0.01

Alumina:Silica ratio is 1.00:9.99
Neutral:Acid ratio is 1.00:4.42
Alk:Neut:Acid ratio is 1.00:0.46:2.02

Expansion: 91.0 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

C/04 Quintessence Ash Glaze Base #6

Frit 3134 59
Custer feldspar 4
Ash Berhens 17
EPK 20

Na2O 0.22 Al2O3 0.21 SiO2 1.54
K2O 0.02 B2O3 0.41 P2O5 0.02
MgO 0.02 TiO2 0.00
CaO 0.74 Fe2O3 0.01

Alumina:Silica ratio is 1.00:7.27
Neutral:Acid ratio is 1.00:2.52
Alk:Neut:Acid ratio is 1.00:0.63:1.58

Expansion: 87.7 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3