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glaze test for peter pinnell's green black, cone 6, oxidation

updated sat 29 may 04


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

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.

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.


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