excellent idea Bernard - the troops are getting a bit restless. 

Perhaps you could do a Q&A? Peter is a little ahead of you in this regard. And I'm really curious as to the reason why you picked the word "polvere", but you didnt reply to my message.  Specially it's anglicised etymology could be "pulverised", which HPQ-Pyro's fumed silica certainly isn't, so there's some potential for confusion there.

Brgds

A-G