Alisa og Claus Clausen on fri 12 oct 01
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>Date: Wed, 10 Oct 2001 10:46:48 +0200
>Reply-To: Ceramic Arts Discussion List
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>From: Alisa og Claus Clausen
>Subject: Glaze test forRevised for Marges Clear (Snowflake), cone 6. ox.
>To: CLAYART@LSV.CERAMICS.ORG
>
>
>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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Glaze test for:
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:
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:
Best regards, Alisa
in Denmark
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