[Homeroast] Using CO2 to preserve freshness?
coffee at wmerrin.com
Sat Apr 17 16:37:57 CDT 2010
On Apr 17, 2010, at 1:21 PM, Mike Koenig wrote:
> Anyone have a setup that can pull a vacuum on mason jars?
Yes, they are a standard attachment for Food Saver style vacuum
sealers. They are a cap sort of thing that fits over the jar lid/jar
and pulls the vacuum. I believe at least one person on this list has
mentioned storing green beans this way.
There's another way; I believe someone on the list mentioned it awhile
back. Oxygen absorber packets are readily available; they are used in
packing food for long-term storage and will pull a partial vacuum
reasonably quickly. These packets use up most, if not all, of the
free oxygen in a container by oxidizing the material in the packet.
Typically, it rusts an iron compound, which removes the O2 from the
container atmosphere. This leaves a reduced pressure, mostly inert,
mostly nitrogen atmosphere.
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