[Homeroast] Using CO2 to preserve freshness?

Barry Luterman lutermanb at gmail.com
Sat Apr 17 15:49:33 CDT 2010

How would you keep the beans from freezing?

On Sat, Apr 17, 2010 at 10:21 AM, Mike Koenig <koenig.mike at gmail.com> wrote:

>  Best to stay out of your basement then... no wind to disrupt the CO2 you
> exhale, so it will all slide down into your basement, and you may have some
> trouble breathing down there.
> All theory aside,  I'm getting more and more curious about this, and I'm
> thinking of an experiment (not that I'm motivated enough to run it).  I'm
> thinking that putting some coffee in a jar with a nice size chunk of dry
> ice, and pulling a vacuum will result in a jar that's nearly oxygen free.
> Using the same batch of coffee, comparing an open container, a jar that's
> been capped loosely, a jar like I just described with dry ice after a
> certain period of rest, would put this issue to bed.
> Anyone have a setup that can pull a vacuum on mason jars?
> --mike
>  - The O2 displacement by the more dense CO2 molecules in a closed
>  environment further reduces oxidation, unless the jar has built-in jet
>  streams or meteorological convection currents like the planet has.  Same
>  magic runs windmills...
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