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glaze test for xavier warm jade green, revised, cone 6, oxidation

updated mon 11 feb 02


Alisa og Claus Clausen on sun 10 feb 02

Glaze test for: Xavier Warm Jade Green, revised, cone 6, oxidation.
Credited to: Revision by Ron Roy

All tests fired on white, iron flecked, mid-range stoneware.
Fired to cone 6 (1220c) in oxidation.

Firing ramp:
100c (212f) per hour to 600c (1112f)
150c (302f) per hour to 1100c (2012f)
100c per hour to 1220c (2228f)
15 - 30 minute soak depending on matts and glosses used.
cool down 100c per hour to 900c.
Natural cool down to 150c (approximately 15 hours)

22 Custer Spar
16 3134
12 Whiting
9 Talc
20 EPK
21 Silica

Copper Carb.
5 Rutile

All raw materials measured up or down to nearest whole decimal.
Oxides used on percent basis to a 100 gram batch of glaze.

Forshammer Spar for Custer Spar.

Resulted in:
A fluid but not dripping, glossy light jade green glaze that is
transparent. Where thickest, the glaze moved and streaked with lighter a
celedon like green. A single whitish streak where very thick.

Regards from Alisa in Denmark