AMACO® Sahara High
Fire Glazes are compounded to match porcelain and stoneware bodies.
Matt and textured glazes suitable for stoneware and transparent gloss
glazes for translucent porcelain are included in this series.
AMACO® Sahara High Fire Glazes work well and produce interesting
effects when fired in reduction as well as in oxidation (reduction
firing not recommended for HF-26). We also suggest experimentation
using Amaco® Opalescent glazes or High Fire Texturizers in combination
with High Fire Glazes.
In liquid form, AMACO® Sahara High Fire Glazes are ready-to-use while
dry powdered glazes are mixed with water. Although these glazes may be
applied on bone dry greenware for single firing, it is easier to apply
them on low fire bisque. HF-26 and HF-32 should be applied thicker than
other glazes in this series. HF-36 should be fired to Cone 4 (2161°F,
1183°C) to obtain texture. For best results: if brushed they will need
three coats. Then clay and glaze may be matured at the same time, at
the recommended firing temperature of Cone 5 (2205°F, 1207°C).
A zinc-free, clear, transparent high fire glaze (HF-9) is also
available. Because the presence of zinc in a glaze formula may change
the appearance of certain colors (green, black, gray, etc.), a
zinc-free clear is very important for application over underglaze
decoration. When used under HF-9 Zinc-Free Clear, colors will fire
true. Any variation in color intensity of the underglazes will then
depend on the individual color stability at Cone 5. Firing range is
from Cone 4 (2161°F, 1183°C) to Cone 6 (2269°F,
Amaco Sahara High Fire Pottery Glazes
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