Mary Humphrey’s
Raku Glazes from Michigan Mud 2005
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| All of these
glazes mature around cone 06-08, but Mary uses a
“visual melt.” Please test these yourself,
and always use all safety measures. All recipes
are measured by weight unless otherwise noted as
“parts by volume.” |
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| Copper
Sand |
| Gerstley Borate |
8 parts by volume |
| Bone Ash |
2 parts |
| Copper Carb |
1/2 part |
| Cobalt oxide |
1/4 part |
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| Raku
Clear |
| Gerstley Borate |
80 |
| Custer Feldspar |
20 |
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| Lizard
Skin |
| Borax |
8.4 |
| Gerstley Borate |
58.8 |
| Lithium Carb |
12.6 |
| Magnesium Carb |
3.4 |
| Neph Sy |
16.8 |
| Copper Carb |
3 |
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| RB
Turquoise |
| Frit 3124 |
42.5 |
| Lithium Carb |
9.8 |
| Frit 3134 |
27.4 |
| EPKaolin |
6.3 |
| Flint |
14 |
| Bentonite |
2 |
| Copper Carb |
3.5 |
| Tin Oxide |
4.5 |
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| Dry
Copper Slip |
| (Use on
bisque like a glaze) |
| Copper Carb |
75 |
| Kona F-4 spar |
15 |
| Ball Clay |
10 |
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| Intermediate
Slip (resist) |
| EPKaolin |
3 parts |
| Flint |
2 parts |
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| Slip
Resist 1 |
| Fireclay |
50 |
| EPKaolin |
30 |
| Alumina Hydrate |
20 |
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| Slip
Resist 2 |
| For easier
removal, decrease alumina hydrate |
| Ball Clay |
40 |
| EPKaolin |
40 |
| Alumina Hydrate |
20 |
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| Terra
Sig - White |
| Ball Clay |
1 1/2 cups |
| EPKaolin |
1 1/2 cups |
| Water |
10 cups |
| Sodium Silicate |
2 Tbs. |
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