soft paste

1 : a ceramic body containing refined clay and a glassy frit

2 or soft-paste porcelain : a soft low-fired translucent ware with a soft-paste body produced in Europe from the 15th through the 18th century — compare hard paste

3 : a fine-grained opaque Chinese ceramic ware related to true porcelain but having part of the kaolin replaced by pegmatite and usually being fired twice