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glaze test for oxides under zinc semimatte/glossy base glaze, cone 6,

updated sun 17 nov 02


Alisa Liskin Clausen on sat 16 nov 02


Glaze test for oxides under zinc Semimatte/Glossy Base Glaze, cone 6, =

Glaze tested on white midrange stoneware fired in electric oxidation to =

Source: Mastering Cone 6 Glazes
Credited to: John Hesselberth and Ron Roy

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

Please refer to the above book page 98.

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.


Smooth semi gloss white glaze.=20
Oxides Cobalt, RIO, black stain, Chrome and Ocher showed well under =
glaze. The Cobalt is variegated with very slightly diffused edges. The =
Other oxides stayed where painted. The Chrome turned pinkish beige.

Regards from Alisa in Denmark