Physics behind the Coffee Ring effect

[StillShaving]

For the true coffee geek. A look at how coffee rings form and why. With up close video clips. Article here:
Particle size matters when coffee dries up

 

[SiBurning]

I always wondered why the rings from coffee ground in my Zassenhaus hand grinder were perfectly round while the rings from coffee ground in the Baratza were ellipsoids.


I'm still wondering.

 

[gearchow]

Trickery! I started reading about coffee and I ended up reading science. Nice!

Maybe they will come out with the ultimate self-leveling paint.

-jim

 

[StillShaving]

I always wondered why the rings from coffee ground in my Zassenhaus hand grinder were perfectly round while the rings from coffee ground in the Baratza were ellipsoids.


I'm still wondering.

Interesting, if I learned anything from that video it must mean your Baratza grind particles are not as round or you also grind soap in your Zassenhaus, but that effect is puzzling.
Jokingly I want to say it must be a Zen thing, how the coffee ring wants to become one with the shape of the coffee been again.

 

[rxonmymind]

Hmm, the Rorschach blot test at your local coffee house. Either a good way to keep a date or ditch one. "I see a Pig with a green frog"....