I think we have to have some trust in the guys and gals that run Archer.

https://hotcopper.com.au/threads/ann-appointment-of-halloysite-kaolin-expert.5213719/

"Mr Zeitoun has an extensive network within the halloysite-kaolin
industry, having recently completed a strategic commercial partnership agreement with the
Kaolin Division of BASF Corporation†"

https://kaolin.basf.com/applications

Kaolin Applications

You might be surprised at all the places kaolin ends up

It's virtually impossible to look around and not see an example of kaolin in use. It's found in papermaking, where it is used in the coating process to enhance gloss and opacity as well as improve printability. It can also be used as a cost effective filler for many paper applications. In inks, paints and coatings, kaolin is used as a cost-effective pigment that provides functionality and also extends costly titanium dioxide. In cables, rubber and plastic, kaolin adds strength and durability to the final product while improving its looks. And in the construction industry, kaolin can improve the appearance of various types of concrete while increasing strength.

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