Screen E-Book (.PDF) - MacDermid Autotype

Solution1. Earth the press.2. Raise the print room humidity.3. Use deionised air reduce static on thesubstrate.Poor cure of UV inkDescriptionPoor cure of UV ink generally results inpoor adhesion. Ink not adhering well tothe substrate can be seen as reticulation orwrinkled surface. Adhesion can be testedby ‘finger nail scratch and tape test’ ‘crosshatch and tape test’ or ‘thumb twist’.Cause1. UV curing unit not working correctly.2. UV ink layer too high.3. Substrate and ink combination are notcompatible.Solution1. Check lamp, power setting, lamp assemblycleanliness, bulbs and belt speed.2. Check that the ink layer is not too high,check the mesh count and use a low EOMstencil.3. Ensure that the ink and substrate arerecommended for use with one another.4. Ensure that the substrate is not porousto the ink.133