It is hard paste, and equal to that of Sèvres, and of the same forms.
hard paste cannot be scratched or filed and resists the action of great heat.
Only a hard paste, or kaolin ware, is acknowledged by experts to be genuine porcelain.
This explains why some specimens with Chelsea decoration have a hard paste.
There was also a factory for hard paste established by Greiner and Haman here in 1762.
A similar wavy appearance is found on123 characteristic pieces on Bristol hard paste porcelain when turned upon the wheel.
The hard paste was used after his purchase of the patents, etc., of the Plymouth factory in 1774.
In 1761 there were three furnaces, one for hard paste ad uso Sassonia, and two for soft paste ad uso Francia.
At Limoges, in 1773, soft porcelain was made; later, hard paste was made.
The attempts to arrive at the hard paste by experiment resulted in the establishment of many soft-paste factories.