Alisa og Claus Clausen on wed 23 jan 02
Glaze test for: Glaze test for Rosie's Red, cone 6, oxidation
All tests fired on white, iron flecked, mid-range stoneware.
Fired to cone 6 (1220c) in oxidation.
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)
19.8 Kona f-4 Feldspar
31.7 Gerstley Borate
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 Kona F-4
Dark brown gloss with rust colored spots where glaze lay lowests and
thickest. Black gloss where glaze went over high spots and
Will re-fire in bisque to see if it goes redder.
Regards from Alisa in Denmark