Kaolins [noun]

The Kaolins in general appear to consist of alumina and silica in nearly equal proportions.

Some kaolins are rather plastic but most of them are "short" in working and rather tender.

Found in a crystalline form in china clays and kaolins (p. 107).

The kaolins are primary clays formed by the decomposition of felspar and occur in many parts of the world.

Ries and other American observers are equally convinced that certain kaolins they have examined are the result of 'weathering.'

Some high class commercial kaolins contain over 30 per cent.

As the china clays (kaolins) and ball clays on very careful elutriation all yield a product of the same ultimate composition, viz.

It is a mistake to suppose that all white clays of slight plasticity are china clays or kaolins.

The porcelain clays and kaolins contain about half their weight of this earth, to which they owe their most valuable properties.

Some kaolins appear to have been formed by weathering and others by subaerial action.