Judy Schaefer on thu 15 may 03
Hi Wesley,
Many of my students really like this one:
PEIPENBURG’S RED BRONZE LUSTER GLAZE
Gerstley Borate 50 - (45)
Frit 3134 45
Add:
Tin Oxide 3%
Black Copper Oxide2%- (2.5 %)
Notes: Oxidation = green; reduction: container
reduction = blood red
Strong reduction = bronze
Higher temp: darker green
Lower temp: yellow green
Frequent burping gives alternating layers of oxidation
and reduction; sometimes if the quenched surface is
rubbed, you can reveal an underlying layer.
High temperature (1900?F or higher, soak and firing
down allows the copper to crystallize).
Hope this helps, Judy Schaefer
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