We make our own plastic framed sieves using slices of reclaimed plastic
ducting, you can get it up to 8 inches in diameter. A better trick than
a soldering iron it to put a hot-plate or frying pan on medium to low
heat, lay a piece of cooking foil on it, then the mesh, then press the
plastic pipe onto that until a small bead of softened plastic appears
around the pipe/mesh join. Remove from the heat and place on a cold
surface, and then peal off the foil. Finally clean off the edge on a
sander. It takes longer to write about it than to do it!

Steve
Bath
UK


In article , Jake Loddington
writes
Back to this question.... I will have to buy a sieve - I believe I was
told
80 mesh.... Is that going to be fine enough?
If you are looking for an inexpensive source for sieve
material to make your own, the best place I've found
is McMaster-Carr. A 1ft square of most any mesh size
is in the 7-8 dollar range. I built a simple square fram
from 2x2 lumber and stapled the sieve screen to the
face of it, then gave the frame multiple coats of semi-gloss
interior latex to seal both the wood and the seam where
the screen meets the wood. Works great!

It might be easier to get a piece of PVC pipe about 200 mm diameter, and
cut off about an 80 mm length. (I scrounged a bit of yellow PVC: is that
for gas?) Lay the mesh on it, and run a biggish soldering iron (25 watts
is plenty) round the edge, to weld the mesh into the PVC. Then cut round
the outer edge, being careful not to leave any strands of the mesh
sticking out.

The big advantage of a circular frame is that there are no corners to
clean out after use.


--
Steve Mills
Bath
UK