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was little tiny spheres now roughness on pot bottoms

updated tue 29 jun 10


gayle bair on mon 28 jun 10

When a few pots I fired last week had roughness on the bottoms I found a =
double duty for the kyanite I had sprinkled on the kiln shelves.=3D20
I took the rough bottomed pots and rotated them on the shelf which =3D
ground down the pot's roughness and smoothed out any roughness from =3D
layers of kiln wash or plucking on the shelf surface. It worked very =3D
Harbor Freight has small mesh sanding sponges that can be used wet or =3D
dry . I take those to shows in case I've miss a spot.=3D20
Another tip is to lay a piece of sandpaper on a piece of foam ( I use =3D
1/4" thick dense foam) and rotate the pot on the sand paper.=3D20

Gayle Bair
Bainbridge Island WA
Tucson AZ

On Jun 27, 2010, at 11:40 AM, John Rodgers wrote:

> Joe,
> Roughness on the bottom of a pot is anathema to the womenfolk - who =3D
> 97% of my customers. I don't want a lady customer casting a curse on =3D
> for her antique dining table inherited from Great Aunt Bertha one
> removed, getting scratched from roughness from one of my cassarole
> dishes or the like. Nosirree!! I deal with the rough pot bottoms by
> hand grinding them on an 18 inch or so diameter carborundum pad. Costs
> about $6-$8 bucks. They are a mesh of the type used in sanding =3D
> filler and sealers. They come in different grits from fine to coarse
> with various grits in between and have the carborundum embedded in =3D
> mesh. I simply place the pot on the carborundum disk, and slide the =3D
> round and round on its bottom until smooth. Only takes a minute and =3D
> have a smooth pot bottom. The material that grinds off the pot gets =3D
> in the interstices in the mesh. When done grinding, just lift the mesh
> off the surface it's on, tap with a brush handle and all the grindings
> will fall out, and can then be swept up. I use this method on green =3D
> and on bisque as well. Works great.
> Hope this helps.
> John Rodgers
> Clayartist and Moldmaker
> 88'GL VW Bus Driver
> Chelsea, AL
> Http://
> On 6/27/2010 11:45 AM, Joseph Herbert wrote:
>> Hello,
>> Snip>
>> I always polish the foot ring of my pots after trimming. (I'm just =3D
>> way.) After bisque, the foot rings are not noticeably rougher. =3D
>> after the high fire, there are all these little balls.
>> They don't really harm the pots and they are easily (?) removed with =3D
>> carbide paper or stones. I wonder if anyone else has observed this
>> phenomenon? IF so, what is it?
>> Joe
>> Joseph Herbert
>> Training Developer