Alisa og Claus Clausen on wed 10 oct 01
Glaze test for: Revised for Marges Clear (Snowflake), cone 6.
ox.
Source: Original recipe from Chris Clarke.
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: Revised.
35 Forshammer Feldspar
16 Silica
17 Zinc
12 Ball Clay
20 Wollastonite
ADD
3 Copper Carb.
2 Rutile
1 Zircopax
Original recipe:
17 Whiting
35 Spar
12 Ball Clay
19 Silica
17 Zinc ox.
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:
Resulted in:
Slightly lighter, more cornflower blue than original cobalt
blue. Streaking and movement in a gloss surface.
Pools to attractive medium, bright blue. Stayed where glazed.
Best regards, Alisa
in Denmark
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