[quote=“kernels, post:9, topic:2038”]
It is literally invisible Gold. Until you get a few million of them together.
[/quote]Could ‘stub your toe’ on a few million LOL.
Only need 1,000µm to be easily visible (1mm) I was playing on the phrase, not the literal meaning. (I work with stuff with a d50 of around 0.5µm - That’s so fine, gravity takes the back seat to molecular charges in regards to physics!)