debkaplan3 on wed 17 jan 01
Dear Ivor & all,
Does this mean that if I
-raku fire a piece with typical white crackle glaze....into trash can...get
nice black carbon in the crackle
-then refire in elecric kiln to 1650 deg F (well under 1864 deg F)
that I will not lose the carbon in the crack lines??? I'd love to be able
to do this.
Debbie Kaplan
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of iandol
Sent: Monday, January 01, 2001 8:10 PM
Subject: Carbon Trap Theory 1
>I consider it most probable, after reading about the chemistry of the
Carbon gases, that this effect will occur to the
>greatest degree at a temperature of about 600 deg C (1112 F). As
temperature rises from this point, the rate at which carbon
>will form in a clay or glaze will diminish towards a minimum when the
pottery reaches 1000 deg C (1864 F). Above this
>temperature the reverse reaction will take place if kiln gas rich in Carbon
dioxide can diffuse into clay or glaze.
>..............................
Ivor Lewis. Redhill, South Australia.
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