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Precision Woven Synthetic Filter Mesh

What is Precision Woven Filter Mesh

It is a synthetic woven filter mesh made of monofilament yarn, specialized in defined and controlled, consistent and repeatable material properties such as mesh opening (pore size), fabric/mesh thickness, tensile strength, dimensional stability, cleanliness and so on.

Stencil Terminology

EOM “Emulsion Over Mesh.” Proper EOM is typically 10 - 25% of

mesh thickness (ft).

Rz Surface roughness of the print side. A stencil with a low Rz

value has a smooth surface (desireable Rz < 5).

MESH TO MICRON CONVERSION CHART

Mesh preparation
Abrasion and degreasing to make the mesh more receptive to stencil adhesion.

This variable precedes the discussion of other stencil variables because it is the source of various common stencil-breakdown problems-pinholes, fisheyes or poor stencil adhesion to the mesh-often blamed on the emulsion itself. The screen mesh must be prepared for stencil application by, in some cases, abrading and, in all cases, degreasing.

Mesh tension: A measure of mesh deflection expressed in terms of Newtons per centimeter (N/cm). 

Tension should be looked at in two ways: the initial stretching and re-tensioning of mesh on your frames, and the ways in which tension interacts with other variables during printing. It's difficult to understand its dynamics without looking at tension relative to off-contact distance and squeegee-blade pressure, so be sure to visit those variables after you've read about this one.

The twofold job of mesh tension is to provide resistance for the blade-to be overcome only at the point where the blade forces mesh-to-substrate contact-and to pull the mesh out of the ink film after the blade passes.