Re:Heineken WOBO: A Beer Bottle That Doubles as a Brick
by markvdb on Monday March 30, 2020 @09:29AM
(#22727833)
You mention doubts about moisture or air permeability. It's a uniquely breathable material.
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Re:Heineken WOBO: A Beer Bottle That Doubles as a Brick
by vanderZwan on Monday March 30, 2020 @10:47AM
(#22728428)
Oh, my apologies! I got the impression that the process of making them has the end-result of lots of closed off bubbles. But you're right, reading the wiki page again shows otherwise:
> Sound-absorbing Foamglas® insulation is more than 50% open cell bubbles, and heat-insulating Foamglas® is more than 75% closed-cell air bubbles, which can be adjusted according to the requirements of use through changes in production technical parameters.