Alisa og Claus Clausen on wed 10 oct 01
Glaze test for: Black Friday, cone 6, ox.
Source: Jeff Zamek
All tests fired on white, mid-range stoneware.
Fired in 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.
Recipe:
20 Nepheline Syenite
15 Whiting
18 EPK
20 3134
17 Flint
10 Bone Ash
ADD
12 Mason Stain #6600
1 CMC
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:
Local Frit for 3134
Generic Black stain. Omitted CMC.
Resulted in:
Semi matt black glaze. Stayed where put and no discernable
difference where double dipped. Very smooth surface.
Best regards, Alisa
in Denmark
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