Alisa og Claus Clausen on wed 23 jan 02
Glaze test for Chappell's Clear Semi Gloss, cone 6, oxidation.
Source: Clayart
Credited to:
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)
Recipe:
45.7 Kona F-4 Feldspar
15.2 Silica
12.7 Talc
12.9 Gerstely Borate
9.0 Dolomite
4.5 EPK
1.0 Bentonite
Note:
All raw materials measured up or down to nearest whole decimal.
Oxides used on percent basis to a 100 gram batch of glaze.
Substitutions:
Forshammer Feldspar for Kona F-4.
Resulted in:
Clear semi gloss. The lines of Burgundy stain, RIO and Cobalt oxide all
came well through the glaze, with
stable edges. Has a satiny feel.
Regards from Alisa in Denmark
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