Alisa og Claus Clausen on fri 12 oct 01
>Date: Wed, 10 Oct 2001 11:21:28 +0200
>To: Ceramic Arts Discussion List
>From: Alisa og Claus Clausen
>Subject: Glaze test for Revised Simple Blue, cone 6, ox.
>
>
>
>Glaze test for: Revised Simple Blue, cone 6, ox.
>Source: 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.
>
>Revised Recipe:
>38 Forshammer Feldspar
>29 Silica
>23 Wollastonite
>10 Kaolin
>
>ADD
>2 Cobalt Ox.
>1 Tin Ox.
>
>Original Recipe:
>40 Custer spar
>30 Silica
>20 Whiting
>10 Kaolin
>2 Cobalt Ox.
>1 Tin 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:
>A shiny but not glassy, cobalt blue glaze. Medium blue in color and even
>covering. Stayed where glazed.
>Slightly darker and slightly less glossy than original recipe.
>
>Best regards, Alisa
>in Denmark
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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