Alisa Liskin Clausen on sun 8 sep 02
Oxblood, cone 6 redux, fired to cone 6 ox.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source: Clayart
Credited to:
Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1100c (330f - 2012f)=20
100c p/h to 1220c (212f - 2228f)
cool down max. per hour to 1100c=20
cool 80c per hour to 800c
shut off kiln
Recipe:
54.58 Neph. Syenite
12.44 Gerstley Borate
10.44 Whiting
21.06 Silica
0.38 Copper oxide
0.98 Tin Oxide
Note: All raw materials are measured up or down to the nearest whole =
decimal. =20
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.
Substitutions:
Borax frit for Gerstley Borate
Results:
Clear gloss with red under surface. Crazed.
Regards from Alisa in Denmark
Ron Roy on fri 13 sep 02
Possibly a stable glaze with GB - expansion is on high side so will craze
on many bodies.
RR
>Oxblood, cone 6 redux, fired to cone 6 ox.
>
>Glaze tested on white midrange stoneware fired in electric oxidation to 1220c.
>
>Source: Clayart
>Credited to:
>
>Firing ramp:
>100c p/h to 600c (212f - 1112f)
>150c p/h to 1100c (330f - 2012f)
>100c p/h to 1220c (212f - 2228f)
>cool down max. per hour to 1100c
>cool 80c per hour to 800c
>shut off kiln
>
>Recipe:
>54.58 Neph. Syenite
>12.44 Gerstley Borate
>10.44 Whiting
>21.06 Silica
>0.38 Copper oxide
>0.98 Tin Oxide
>
>Note: All raw materials are measured up or down to the nearest whole
>decimal.
>Colorants or additives to a 100 gram test batch are measured in percent to
>the 100 gram test batch.
>
>Substitutions:
>Borax frit for Gerstley Borate
>Results:
>Clear gloss with red under surface. Crazed.
>Regards from Alisa in Denmark
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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