Screen E-Book (.PDF) - MacDermid Autotype

The mesh does the meteringThe 1-2-3 stresses that the ink depositshould be controlled by the mesh alone– not print speed, not viscosity, not thesqueegee (unless you choose to go out ofcontrol with a rounded or light squeegee),not the stencil.But what controls the amount of ink leftbehind when the mesh comes out of theink?There’s an important, but very simple formula:Ink Deposit = Ink in the Mesh at the Start –Ink on the Mesh at the EndInk in the mesh at the startInk in the mesh at the end – and on the print=IMS=IME=IMS - IMEOrInk Deposit = IMS – IMEThe “Ink in the mesh at the start” is easy to calculate. It’s simple geometry.Graphically we findThe total height of this ideal mesh is twice the mesh diameter,2D and the spacing M is 1/TPM (Threads Per Micron)22