BRT or Buff Raku Trachyte – is a specific type of clay that when fired to Midfire or Stoneware temperatures the dark speckles can bleed through and melt onto the kiln shelves. To avoid this, any work made of BRT must have a setter to sit on in the kiln, or as per the T&C’s you will be responsible for the repair/replacement of the kiln shelf. A setter is a small flat tile made of any other type of Midfire or Stoneware clay.
Setters can be made out of any clay with the same firing temperature as your work, and should be bisque fired prior to use. Check out our Instagram highlights for tips.
The clay is called Feeney’s BRT and it will be very clearly marked on the clay packaging. If you have not used BRT clay you do not need a setter.
You must provide your own setters for all of your work. The setters must cover the entire base of your piece.