TERRA SIGILLATA - RAKU
actual pieces are coilbuilt in different technics from grogged German stoneware
clay. They are burnished when leatherhard and covered with thin layers of terra
sigillata. That is a very fine shiny slip also used in ancient history in
which I produce from special clay bodies. After a first biscuit firing
again a second time layers of terra sigillata are
put on followed by a second firing.
the pieces are covered with a slip and sometimes glazed. They are fired in a gas kiln with
following reduction in sawdust. With influence of water the slip crackles away
like an egg-shell, the burnished piece appears again.
call this technique „ VERLORENE GLASUR“ ( Lost glaze).