Karen Sullivan on mon 30 oct 00
Mary...
If the definition of ceramic materials is how those materials respond to the
affects of heat....Wax is gone-vaporized-history at 350-400 degrees. It is
great for resisting the glaze while decorating, but will do nothing to
prevent the glaze from running. The glaze gets molten at about 2000 degrees.
What I do is bevel the glaze edge with a damp sponge so the glaze is thinner
at the bottom level(about 1/4 inch) and if it runs has to travel and thicken
down the side of the piece to get close to the kiln shelf. Does that make
sense. Visualize a triangle, place the triangle against a flat plane, the
point of the triangle is at the bottom...the glaze varies in thickness from
the bottom...getting thicker as you move up the plane of shape of the piece.
I accomplish this with a wet sponge, stroking in one direction from the
bottom in an upward direction to clean off the glaze.
Hope this helps.
bamboo karen
on 10/30/00 9:38 AM, Crabtree, Mary B at meb3@CDC.GOV wrote:
> Hi,
> I'm new to the list as well as being new to pottery (~10 months)...have been
> getting a lot of useful from reading posts on the list but only now
> subscribed as I have a problem I need some advice on. Any info or
> suggestions will be appreciated. Its probably an age-old question, but here
> goes.
>
> I was taught to simply wipe glaze from foot rings on pots to clean them off
> before firing to prevent sticking to the kiln shelves. Most of the time
> this works fine, but I've been working with a couple of glazes that seem to
> be particularly runny, yet beautiful, and my last glaze firing resulted in 3
> really nice pieces that melted onto the kiln shelves.
>
> I've read that many potters use wax on foot rings. What's the consensus on
> this? Will waxing up the side of the pot a bit keep the glaze from running
> onto the shelves better than just removing an area of glaze? If you do wax
> the rims do you use the same type of wax as used in glaze decoration
> techniques? Do you brush it on (I'm not good with brushing a straight line)
> or do you dip the bottoms of your pots in the wax?
>
> Thanks in advance for any suggestions...
>
> Mary
> meb3@cdc.gov
>
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