Alisa og Claus Clausen on fri 12 oct 01
>
>
>Glaze test for: Revised Peacock Blue, cone 6, ox.
>Source: Clayart
>
>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:
>40 Feldshammer Feldspar
>15 Ball Clay
>12 Silica
>18 Wollastonite
>15 Zinc ox.
>
>ADD
>10 Titanium co.
>1 Cobalt ox.
>1 Copper ox.
>
>Original recipe
>40 Potash
>15 Ball Clay
>20 Flint
>15 Whiting
>15 Zinc ox.
>10 Titanium ox.
>0.75 Cobalt ox.
>1.0 Copper 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:
>Same greenish brown background as original. However, this version
>produced pools of light blue instead of the originals deeper blues. Much
>more contrast in the greens, blues and browns. On a slightly textured
>surface looks very much like it's name. Glaze stayed where
>dipped. Glossier surface than original semi matt. Think this looks good.
>
>Although I like the original glaze recipe for some pots, with it's more
>matt surface, I think this glaze will compliment throwing rings and
>such. Very lively, colorful, smooth surface.
>
>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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