Craig Clark on tue 9 apr 02
Somewhere I picked up, don't ask me where because I don't remember, the
suggestion that holes drilled through the shelf would also help to aleviate
this problem. I've never tried it because all of my larger platters have
foot rings and cracking isn't that much of an issue.
Has anyone tried the holes through the shelf trick? Maybe I heard about
it from one of the tile folks.
Craig Dunn Clark
619 East 11 1/2 st
Houston, Texas 77008
(713)861-2083
mudman@hal-pc.org
----- Original Message -----
From: "Dannon Rhudy"
To:
Sent: Tuesday, April 09, 2002 9:27 AM
Subject: Re: Firing 14" Bottom Diameter Pots
> ...following this thread since it started
> .... Am I missing something here? Don't we want the area of contact
> to be as much as possible.....
>
> Indeed, we don't. Especially for large, wide pieces such as
> platters, the heat from the shelf keeps the bottom really hot
> while the edge is cooling. This often results in cracked
> work. There are a variety of ways to moderate this, but lifting
> the piece off the shelf enough to get some circulation is
> a good technique. If a piece is footed, the foot ring will
> help to moderate the transfer of heat to the bottom of the
> work, and a notched foot ring will do even better. But for
> large flat work, and for platters without foot rings or with
> very shallow ones, finding a secure way to lift them a bit
> off the shelf is very helpful in preventing rim-to-center
> cracking.
>
> regards
>
> Dannon Rhudy
>
>
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