why_not

I have recently carried some successful trials using saggars to produce cone 6 copper red reduction glazes in an electric kiln.  I generated a reduction atmosphere by adding a small amount of black iron oxide mixed with powdered charcoal to the bottom of a saggar with a test piece painted with Selsor red copper reduction glaze (see formula in "The Complete Guide to Mid-range Glazes " by J. Britt pg 100).  I started with a copper red cone 6 glaze because it is easy to see if there is reduction; red=reduction / green=no reduction.  The iron oxide/ charcoal mixture reacted to produce a reducing carbon monoxide atmosphere within the saggar, as the electric kiln was fired to cone 6, which changed the glaze oxblood red (see attached photo).  The atmosphere in the kiln remained oxidizing so that test patchs of the same glaze painted on the outside of saggar remained green.
I hope that by sharing these results I can generate feedback on this this technique.
 

I have recently carried some successful trials using saggars to produce cone 6 copper red reduction glazes in an electric kiln.  I generated a reduction atmosphere by adding a small amount of black iron oxide mixed with powdered charcoal to the bottom of a saggar with a test piece painted with Selsor red copper reduction glaze (see formula in "The Complete Guide to Mid-range Glazes " by J. Britt pg 100).  I started with a copper red cone 6 glaze because it is easy to see if there is reduction; red=reduction / green=no reduction.  The iron oxide/ charcoal mixture reacted to produce a reducing carbon monoxide atmosphere within the saggar, as the electric kiln was fired to cone 6, which changed the glaze oxblood red (see attached photo).  The atmosphere in the kiln remained oxidizing so that test patchs of the same glaze painted on the outside of saggar remained green.
I hope that by sharing these results I can generate feedback on this this technique.