noun
bisque firing
The first firing of pottery without glaze, hardening the clay body.
素焼きの前に締め焼きを行うこともある。
Sometimes bisque firing is done before the bisque firing.
noun
The unglazed pottery piece resulting from bisque firing.
この締め焼きの皿はまだ釉薬をかけていない。
This bisque plate hasn't been glazed yet.
素焼き also refers to bisque firing or unglazed pottery, but is a more common term. 締め焼き is a less frequent synonym used in some pottery circles.
Compound of 締め (shime, 'tightening, closing') + 焼き (yaki, 'firing, baking'). The exact derivation is uncertain; the term likely refers to a firing process that hardens or 'tightens' the clay.