iandol on thu 18 jan 01
Dear Debbie Kaplan,
The chemistry I gave relates to the behaviour of Carbon Monoxide. This =
gas seemingly undergoes a reaction called "disproportionation" between =
the temperatures of about 650 C (1205 F) and 1000 C (1832F)
If you refire in an electric kiln, there will be oxygen in the kiln =
atmosphere. This will cause the carbon to burn away. Your best hope =
would be to create an inert atmosphere in your kiln, using Nitrogen or =
Argon. Alternatively you could pack your carbon tinted raku in a saggar =
and fill with charcoal, wood or paper to act as a "Getter" for the =
remaining oxygen. A trial would show if this might work.
Margery Clinton discusses the use of gas purged kilns in her book =
"Lustres", Complete Potter Series ISBN 0-86417-410-1.
Best regards,
Ivor Lewis. Redhill, South Australia
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