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glaze test for bristol glaze, by janet hamer, ox. 1250c

updated fri 4 feb 05


Alisa Clausen on thu 3 feb 05

Glaze test for Bristol Glaze, by Janet Hamer, ox. 1250c

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

Source: Hamer and Hamer
Credited to: Janet Hamer

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

65 Feldspar
9 china Clay
3 Flint
8 Whiting
10 Zinc Oxide
5 Titanium 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.

Semi mat, opaque white glaze. Appears a little dry, but has a soft =
sheen and smooth to touch. Oxides showed through glaze, although very =

Regards from Alisa in Denmark