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1. as you are aware, there IS no way to "guarrantee" the purity of pollen. you just be as dilligent as you can, and market it as "natural" and "unprocessed".
2.freezing will dry it- the mosture(most) will appear as a frost or rhime that you shake off. how dry you get it depends on how many freeze cycles you use. most freeze to sterilize, not dry, though.
3.there is a big difference in the effective toxicity of "pesticdes" and "herbicides" the later of which is most likely sprayed on dandylions.
good luck,mike
2.freezing will dry it- the mosture(most) will appear as a frost or rhime that you shake off. how dry you get it depends on how many freeze cycles you use. most freeze to sterilize, not dry, though.
3.there is a big difference in the effective toxicity of "pesticdes" and "herbicides" the later of which is most likely sprayed on dandylions.
good luck,mike