[Homeroast] Using CO2 to preserve freshness?

Yakster yakster at gmail.com
Sat Apr 17 17:05:01 CDT 2010

Putting dry ice in a sealed container is a recipe for disaster.  A popular
trick is to put a chunk of dry ice in a 1 liter pop (PET) bottle and when
the dry ice sublimates, the bottle explodes.  This could be disastrous in

As for sealing mason jars, I picked up one of those foodsaver attachments
and pull a vacuum on my greens stored in jars, real handy.  I'd though of
trying the oxygen absorber packets I mentioned earlier, they actually pull a
vacuum too, but I normally use my roasted within 14 days and am currently
pinching pennies, but if you try this, let us know.


On Sat, Apr 17, 2010 at 1:21 PM, Mike Koenig <koenig.mike at gmail.com> wrote:

> 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

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