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Correct, and zinc sheds into the pollen. Early extractors were also zinc, and they have been phased out in favor of stainless steel. When studying heavy metal pollution, we used plastic grids to collect pollen.
J.J. Bromenshenk
Bee Alert
Missoula, Mt
-----Original Message-----
From: Peter Edwards <[log in to unmask]>
To: BEE-L <[log in to unmask]>
Sent: Mon, Oct 31, 2016 5:43 pm
Subject: Re: [BEE-L] 5 mesh screen for pollen traps
>About 20 years ago galvanized wire screening stopped being manufactured in
the United States, principally because the lead used in the galvanizing
process was an environmental hazard.
Galvanisation uses zinc, not lead?
Best wishes
Peter
52°14'44.44"N, 1°50'35"W
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