[compost_tea] Re: Mesh & Microns

From: dkemnitz2000 <dkemnitz2000_at_yahoo.com>
Date: Tue, 23 Sep 2003 03:25:39 -0000

--- In compost_tea_at_yahoogroups.com, "Kirk Leonard" <kirk_at_o...> wrote:
>
> Ray, Mike, Thanks. Hey, you guys got within 6% of the same 100 mesh
> numbers! So where did you find your 100 micron/100 mesh fiber/wire
filter,
> Mike?
>
> Seriously, thanks both of you for your informative reply. This is
what I
> understand from it plus what I understood before, to confirm:
>
> "Mesh" is a relative number, approximating holes per inch. Microns
> (millionth of a meter, same as a micrometer, I think) are
hole/opening size
> number. Thread or wire size determines opening size, ultimately.
(But I'd
> also add here that thread/wire type seems to have a major effect,
other
> subject...) Different manufacturers using different diameter
materials will
> likely have an opening size that results in a different mesh number
from
> others. No wonder I'm confused.
>
> Correct? What we want is to know the microns of the openings, mesh
being
> determined by diameter of the material and not very informative,
hmm? Size
> of openings per inch, not mesh, is most important. Ya?
>
> But here's another confusion: A paint filter here in US has an
opening
> about 1 millimeter (1,000 microns) by half-a-millimeter or so. Do
you use
> the horizontal or vertical to determine "mesh?" I mean this
jokingly.
> Paint filters seem to make good compost filters, whatever the
mesh. What a
> mess is this mesh, eh?
>
> Mike's table confirms mesh and microns are inversely related, for
square
> holes anyway. You'd think for someone getting used to accomodating
ten's of
> variables, three variables would be easier to do, but I still don't
get
> it... Gonna go for microns of openings, though, whatever mesh.
>
> -- Kirk






So Kirk what size screen do you use to filter ACT? Last Friday I
ordered a #12 mesh for $67. I decided to get the coarsest, which I
thot might not plug the nozzles. I may wish for a #20 soon. Dennis


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Received on Tue Sep 23 2003 - 00:29:35 EDT

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