As a 129 final finish, the flesh side may be rubbed over with chalk or china clay to give it a clear saleable appearance.
Kaolin or china clay is usually fine, white, and refractory.
According to Hickling the product of the action of hydrofluoric acid 'has not the remotest resemblance to china clay.'
We failed to trace any legend or folk-lore about china clay.
In the St Austell district the place of tin and copper mining has been taken by that of the raising and preparation of china clay.
This first discovery of china clay has led to that great development of the industry, of which St. Austell is the centre.
Years ago there had been a small find of china clay on the headland.
"Fish, tin, and copper," was the old commercial toast; but china clay has come in and taken a front seat.
Now, the clay is easily penetrable, and the original hole probably pierced a bed of china clay.
The china clay of Cornwall is added to the same mixture of flint and felspar, when a finer pottery or porcelain is required.