Alisa Clausen on fri 28 may 04
Glaze test for Peter Pinnell's Green Black, cone 6, oxidation =20
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:
4.3 Frit 3134 used Frit J
29.3 Neph. Sye.
27.2 Spodumene
17.8 Strontium Carb.
12.0 Grolleg China Clay
8.0 Silica
1.4 Lithium Carb.
ADD
5.0 Copper Carb.
5.0 Titanium Diox.
can do experiment with 3,4 and 5% Carb. Carb.
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 semi mat with movement in the surface. The glaze looks similar to the =
original Weathered Bronze where thinnest, but with a better melt and =
therefore slightly more gloss. However, where thickest, this is the =
brightest of greens of all of the Pinnell new formulations of Weathered =
Bronze. It is a strong aqua to grass green, with movement in the =
surface, showing some minute whitish streaking. It is black and green =
where thinnest.
Regards from Alisa in Denmark
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