A strange observation. I put about 1/3 spoon of coffee (Taster's
Choice, 100% pure Instant) into a glazed porcelain (clay ?) cup.
Then about the same volume of Coffee Mate powder (non-dairy
creamer Carnation, a little package from Nestle).
Before adding hot water I started shaking the cup to mix two
powders. Brown coffee grains are larger than while "milk"
powder. NO MATTER HOW LONG I SHAKE I still do not see
uniformity. White powder particles like to stay together, more
or less. Two substances mix but not totally. After some shakings
the mixture becomes nearly uniform but a clear tendency for
clustering seems to prevail. Shaking seems to do two things:
mixing and separating big particles from small particles.
My white cup, by the way, has Einsein's face on one side and
E=m*c^2 on the other. I am sure this is purely coincidental. The
mean depth of my mixture is about 3 mm or so. The bottom
is not perfectly flat. An illusion of some kind? A wrong way of
mixing?
Ludwik Kowalski