Here are the results of a theoritical study using
Richard Zakin’s programme, Describ9.
This programme allows to obtain a statement of
the aspect of a glaze base already in use or of
one you want to develop. I have used this
programme since 1995 to develop many
glaze bases with success.

Voici les résultats d’une étude théorique
réalisée utilisant le programme developpé
par Richard Zakin, Describ9. Ce programme
vous permet d’obtenir un jugement sur
l’aspect d’une glaçure déjà en service ou
d’une que vous voulez développer. J’ai utilisé
ce programme depuis 1995 pour développer
plusieurs bases de glaçures avec
succès.

Jen faraĵoj de abstrakta esploro efektivigita
usante la programo kreita per Richard Zakin,
Describ9. Tio programo vin ebligas akiri
juĝon pri glazuraspekto jam en servado aŭ
kion vi volas kreskigi. Mi usis tion programon
ekde 1995 por kreskigi pluraj glazurbazojn
kun sukseso.

Bass #1 Quintessence

Silica 20
EPK 17
Custer feldspar 26
Whiting 26
Zinc oxide 11
Total 100

Na2O 0.03 Al2O3 0.24 SiO2 1.74
K2O 0.07 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.60 Fe2O3 0.00
ZnO 0.31

Alumina:Silica ratio is 1.00:7.11
Neutral:Acid ratio is 1.00:7.13
Alk:Neut:Acid ratio is 1.00:0.24:1.74

Expansion: 78.1 x 10e-7 per degree C

Bass #2 Satinée/Brillante

Barium carbonate 7
Silica 19
Frit 3134 13
EPK 10
Custer feldspar 35
Talc 8
Zinc oxide 8
Total 100

Bentonite 1

Na2O 0.12 Al2O3 0.30 SiO2 2.94
K2O 0.12 B2O3 0.13 P2O5 0.00
MgO 0.18 TiO2 0.00
CaO 0.18 Fe2O3 0.00
MnO 0.00
ZnO 0.29
BaO 0.11

Alumina:Silica ratio is 1.00:9.93
Neutral:Acid ratio is 1.00:6.92
Alk:Neut:Acid ratio is 1.00:0.42:2.94

Expansion: 71.7 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

Bass #3 Quintessence

Barium carbonate 6
Silica 13
Frit 3134 12
EPK 12
Lithium carbonate 12
Custer feldspar 32
Talc 6
Zinc oxide 7
Total 100

Bentonite 1

Na2O 0.08 Al2O3 0.22 SiO2 1.85
K2O 0.08 B2O3 0.09 P2O5 0.00
MgO 0.10 TiO2 0.00
CaO 0.12 Fe2O3 0.00
Li2O 0.36
MnO 0.00
ZnO 0.19
BaO 0.07

Alumina:Silica ratio is 1.00:8.28
Neutral:Acid ratio is 1.00:5.95
Alk:Neut:Acid ratio is 1.00:0.31:1.86

Expansion: 72.8 x 10e-7 per degree C
Oxides causing abnormal expansion: Li2O B2O3

Bass #4 Transparent

Barium carbonate 7
Silica 18
EPK 7
Custer feldspar 56
Whiting 6
Zinc oxide 6
Total 100

Bentonite 2

Na2O 0.10 Al2O3 0.47 SiO2 3.85
K2O 0.23 P2O5 0.00
MgO 0.01 TiO2 0.00
CaO 0.25 Fe2O3 0.00
ZnO 0.28
BaO 0.13

Alumina:Silica ratio is 1.00:8.15
Neutral:Acid ratio is 1.00:8.17
Alk:Neut:Acid ratio is 1.00:0.47:3.86

Expansion: 76.0 x 10e-7 per degree C

Bass #5 Satinée/Brillante (Bristol)

Barium carbonate 7
Silica 12
EPK 9
Custer feldspar 55
Whiting 9
Zinc oxide 8
Total 100

Bentonite 2

Na2O 0.08 Al2O3 0.41 SiO2 2.91
K2O 0.19 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.30 Fe2O3 0.00
ZnO 0.31
BaO 0.11

Alumina:Silica ratio is 1.00:7.06
Neutral:Acid ratio is 1.00:7.08
Alk:Neut:Acid ratio is 1.00:0.41:2.91

Expansion: 79.8 x 10e-7 per degree C

Bass #6 Quintessence

Barium carbonate 10
Dolomite 4
EPK 15
Custer feldspar 54
Whiting 7
Zinc oxide 10
Total 100

Na2O 0.07 Al2O3 0.39 SiO2 1.96
K2O 0.16 P2O5 0.00
MgO 0.06 TiO2 0.00
CaO 0.25 Fe2O3 0.00
ZnO 0.33
BaO 0.13

Alumina:Silica ratio is 1.00:4.99
Neutral:Acid ratio is 1.00:5.00
Alk:Neut:Acid ratio is 1.00:0.39:1.96

Expansion: 85.5 x 10e-7 per degree C