Mug Making? - General Tiki

J johnnievelour Member LongBeach Joined: Mar 25, 2002 Posts: 446	J johnnievelour Posted posted on Wed, Aug 13, 2003 3:35 PM On 2003-08-08 14:56, Saint-Thomas wrote: JohnnieV---- Are you using a clay that fires black? Or is that a surface treatment (slip, glaze, stain, whatever)? I would be very careful about that stuff. Ask someone the chemistry behind that black clay. I myself would hesitate throw with a clay which has elevated levels og Manganese, cobalt or any other metal besides iron. ST- The clay has iron in it. It starts out as a redish, color then, after the glaze fireing, it turns black. All the clays, stains and glazes I use are all OK for use with food and drink. I like my stuff to be art with a function.

On 2003-08-08 14:56, Saint-Thomas wrote:
JohnnieV---- Are you using a clay that fires black? Or is that a surface treatment (slip, glaze, stain, whatever)?
I would be very careful about that stuff. Ask someone the chemistry behind that black clay. I myself would hesitate throw with a clay which has elevated levels og Manganese, cobalt or any other metal besides iron.

ST- The clay has iron in it. It starts out as a redish, color then, after the glaze fireing, it turns black. All the clays, stains and glazes I use are all OK for use with food and drink. I like my stuff to be art with a function.

Post #47707 by johnnievelour on Wed, Aug 13, 2003 3:35 PM