What is "soft-paste porcelain"

Soft-paste porcelain is a type of a ceramic material, sometimes referred to simply as "soft paste". The term is used to describe soft porcelains such as bone china, Seger porcelain, vitreous porcelain, new Sèvres porcelain, Parian porcelain and soft feldspathic porcelain, and is also used more narrowly to describe clay bodies mixed with glass frit, used mainly in the production of decorative figures and domestic wares in 18th century Europe. The porcelain was termed "soft" because of their lower firing temperates compared with hard-paste porcelain.