4 ms·
Vacuum packing small grain-like things like coffee beans/grounds or rice creates a surprisingly sturdy result. I'd be surprised if you could actually move much
by p1necone 4y ago
Vacuum packing small grain-like things like coffee beans/grounds or rice creates a surprisingly sturdy result. I'd be surprised if you could actually move much around without also piercing the plastic.
I've bought products packaged like this before and it's a really odd sensation feeling the bag go from effectively a single solid object to a bag of mush as soon as you release the vacuum.
- Xylakant 4y agoThis effect is used in adjustable casts (these modern plastic ones that you get when you break your foot) and vacuum stretchers for people with a suspected spine injury(+). They’re essentially a bag filled with tiny foam pellets that adjusts to your foot/body shape and turn rock solid once you pump out the air. (+) https://www.rusunsafety.com/VacuumMattressStretcher/ https://www.rusunsafety.com/VacuumMattressStretcher/
- dredmorbius 4y agoI'd run across a demonstration of this somewhat recently. I believe it was a video explaining transitions between free-flowing and locked particles, though I don't recall specifically where, and was unable to find it looking for a few minutes just now. That said: yes, vacuum-sealing good such as beans or coffee grounds provides a surprisingly solid chunk. Releasing the vacuum instantly changes the properties of the mass.