Alisa Clausen on fri 28 may 04
cone 6 oxidation (Kaolin and Ball Clay tested).
Glaze test for Pete Pinnell's Seafoam, cone 6 oxidation.
John Hesselberth has tested this glaze for Copper Leaching and =
recommends this glaze for decorative use only.
Source: Clay Times
Credited to: Pete Pinnell
Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1100c (330f - 2012f)=20
100c p/h to 1220c (212f - 2228f)
5 min. soak
cool down max. to 800c
Hold 1 hour
Shut off kiln
Recipe:
9.6 Frit 3134 used Frit J
51.3 Kona F-4 Feldspar used Forshammer spar
25.5 Strontium Carb.
13.6 Grolleg China Clay
ADD
5. Copper Carb.
5.0 Titanium Dioxide
can experiment with 3,4 5 percent additions of Copper Carb. However, =
Pete notes, unlike the glaze bases with Spodumene,
the copper increments made no difference in the color.
Note: All raw materials are measured up or down to the nearest whole =
decimal. =20
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.
Results:
Applied thick.
A mat glaze that is well melted and very smooth surface. The color is =
a strong aqua green. The glaze is well covering and has a slight sheen, =
although mat. Where it is thicker, is more sheen than where thinner, =
but green in both areas. Has a lush and thick look overall.
Tested same glaze with Ball Clay instead of Kaolin.
Resulted in a very similar glaze, but is slightly darker in overall =
color. It is not as uniform in color or as bright as the recipe with =
Kaolin. It has an appearance that the aqua color is higher surface, =
over a darker ground. With Kaolin the glaze has an even color, with =
Ball Clay, there is more color play on the surface.
Regards from Alisa in Denmark
=20
| |
|
