Spectrum
Andromeda Raku Glaze
Cone 08 raku firing, about 950°C, Electric or gas kiln, then reduction in a bin, Reduction opens the crackle and darkens it with smoke, Results vary piece to piece with the reduction, Lead-free, Not rated non-toxic in the liquid state
$34
Spectrum's raku glazes are made for the raku cycle, not a standard firing. The work fires to cone 08, around 950°C, in an electric or gas kiln and goes into a reduction bin while it is still red hot, either straight out at temperature or after cooling in the kiln to about 870°C, which changes the result. Most of the finished surface is made in the bin, not the kiln. The starved atmosphere reduces the metal oxides in the glaze, and the temperature drop on the way out opens the crackle, which then picks up smoke and shows as a dark web. Because the surface comes from the reduction and not from a controlled cool, two pieces glazed from the same jar will not come out identical. How long the reduction runs, what is in the bin and how fast the work is pulled all change the result. It is lead-free. Spectrum does not rate it non-toxic in the liquid state.
