Screen E-Book (.PDF) - MacDermid Autotype

Solving problemsThe root cause of negativesawtoothingThe image is exactly the same setup as for the one shown in positive sawtoothing, but thesqueegee pressure has been reduced so the ink cannot reach the substrate right next tothe stencil edge.The cure is simple – go to a low EOM stencil. But if the low EOM stencil is also high Rz(which is usually the case) you swap one defect for another. You have to have both lowEOM and low Rz for a great print.Skipping (Graphics printing)A high EOM makes it hard to get the ink through to the substrate and you print only a little“puppy paw” in the middle of the dot.Skipping – the graphicsequivalent to negativesawtoothing86