All but ruined by the French Revolution, Sevres porcelain was resurrected in the early 1800s after Napoleon became emperor. Kaolin was discovered at Limoges, and the production of soft-paste ...

“Capodimonte porcelain, soft-paste porcelain produced by a factory established in 1743 at the Palazzo of Capodimonte by Charles III of Naples.

Through these experiments in pursuit of Chinese-style porcelain came the advent of “soft-paste” porcelain, which is the ceramic type that makes this French covered tureen and plate.

The Worcester soft-paste porcelain service was composed over a number of years from 1763 by Thomas and Lady Betty Cobbe (her title was that as a daughter of the Earl of Tyrone) for their home ...

Additionally, Bartlam was known for experimenting with different clays, ingredients, and soft-paste porcelain, which have left his remaining works with a distinct chemical signature.

Only at Florence, in the year 1575, a method of making soft paste porcelain was found under the patronage of Francesco Maria De Medici, Grand Duke of Tuscany. Consequently, this porcelain is known ...

I think the pieces you have are soft paste porcelain made in England during the early- to mid-19th century. Potential dollar value is low.

This “hard paste” is usually fired at high temperature, but “soft paste” porcelain isn’t, being mixed with a “frit” of soda and sand, the components of glass.