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glaze test for emmanuel cooper smooth white glaze, cone 5-8

updated fri 4 feb 05


Alisa Clausen on thu 3 feb 05

Glaze test for Emmanuel Cooper Smooth White Glaze, cone 5-8.

Glaze tested on white midrange stoneware fired in electric oxidation to =
1240c. (2264f)

Source: Clay Times, Nov/Dec. 2004
Credited to: Emmanuel Cooper

Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)=20
80c p/h to 1240c (176f - 2264f)
5 min. soak
cool down max. to 800c (1472f)
Hold 1 hour
Shut off kiln

37 Potash
15 Whiting
37 Silica
3 Bentonite

Semi gloss, white covering glaze. Iron specks in glaze body showed =

1 Copper Oxide
Gloss, slightly dark, celadon green glaze.

1 Cobalt Oxide
Gloss dark blue glaze.

10 RIO
Semi gloss overall mottled surface. Caramel brown gloss where thickest, =
matter rust brown where thinner.=20

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.

Regards from Alisa in Denmark