Hank Murrow on sat 31 mar 07
Nice post John;
I built a vibrating screen after harry davis' design. The screens are
12" square and interchangeable, the whole thing 'powered' by a 5000
rpm sewing machine motor with an eccentric weight on the shaft to
cause the vibrating. I can run a 1.5" diameter column of slurry from
my blunger through it as fast as I want.......5 gallon bucket of
screened slip in 3 or 4 minutes. with glazes, I switch to the 80 or
100 mesh screen and the glaze just pours through. If there is stuff
left on the screen I use a brush to push it through, or ball mill the
coarse stuff with some of the wet glaze to break it down.
God and Potters bless Harry! Rest his soul.
Cheers, Hank
www.murrow.biz/hank
On Mar 31, 2007, at 5:49 PM, John Post wrote:
> I think an important thing to consider when using a sieve is what mesh
> size you need.
>
> I used to try to push my glazes through an 80 or 100 mesh sieve... the
> kind that fits right into the top of a 5 gallon bucket. The first few
> passes through were always a pain and took too long.
>
> One day I tried running my glaze through a 60 mesh sieve first and
> then
> the 100 mesh second. That is the magic combination for my glazes that
> have titanium dioxide in them.
>
> The first pass through the coarse 60 breaks up the big chunks and the
> pass through the finer 100 breaks down the rest.
>
> If I try to skip the 60 mesh and just use the 80 or 100, it ends up
> taking twice as long.
>
>
John Post on sat 31 mar 07
I think an important thing to consider when using a sieve is what mesh
size you need.
I used to try to push my glazes through an 80 or 100 mesh sieve... the
kind that fits right into the top of a 5 gallon bucket. The first few
passes through were always a pain and took too long.
One day I tried running my glaze through a 60 mesh sieve first and then
the 100 mesh second. That is the magic combination for my glazes that
have titanium dioxide in them.
The first pass through the coarse 60 breaks up the big chunks and the
pass through the finer 100 breaks down the rest.
If I try to skip the 60 mesh and just use the 80 or 100, it ends up
taking twice as long.
John Post
Sterling Heights, Michigan
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