Mike,

Polyethylene is gas permeable. However, it allows for the passage of
gasses in a slow fashion. Polyethylene ziplock bags come in 2, 4, 6 mil
sizes. The thicker the bag the less the permeability.

Thus, using ziplock bags is better than exposing specimens to acidic
atmospheric conditions, although maintaining a lower relative humidity and
getting rid of things that will give off acids is still the best way to
go.

> Hi,
>
> Anyone know whether a shell sealed in a ziplock bag inside a wood cabinet
> is
> at risk for Byne's?
>
>
> Aloha,
>
> Mike
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Regards,
Charlie
.................................................
Charlie Sturm
Research Associate - Section of Mollusks
Carnegie Museum of Natural History
Pittsburgh, PA, USA

Assistant Professor - Family Medicine
Fellow-American Academy of Family Practice
Fellow-Academy of Wilderness Medicine

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