Brian Molanphy on sun 23 mar 03
vince wrote in part:
'And if you ever need to refire a high-fired porcelain piece, don't use
alumina wax. Sponge off the foot or the contact area on the foot and/or
the
lid/seat, and brush on a thin coat of alumina and water. On a
bisque-fired
piece the wax soaks into the clay, leaving the alumina on the surface
where
it belongs. On a previously fired piece, if you use alumina wax, the =
wax
can melt and flow, carrying the alumina into or onto the adjacent glazed
areas, making a real mess.
Best wishes -
- Vince'
well that is cool to know. i've tried using alumina wax, usually the
polymer kind, for lids and galleries in soda firing. lids don't stick, =
but
after the firing the edge between the unwaxed and the waxed areas is
rough. it looks like a thin line of alumina melted into the glaze. can
someone suggest how to avoid this? less alumina? matt long had a pot -a
canister- in a san diego show, that had this edge, tho the problem was
almost unnoticable.=20
brian
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