Verify whether the pilling is defective paper coating or ink
If defective paper coating, try a different batch of paper or lower the tack of the ink slightly, if necessary.
If the ink becomes over-emulsiﬁed/waterlogged, this changes the physical properties of the ink and results in poor transfer.
Check that pH, conductivity, Brix level and temperature are to speciﬁcation and try to run less water.
Ink roller train or ink fountain is too cool.
Adjust form rollers to 72°-80°F (22°-26°C) and be sure ink fountain is 70°F (21°C) or above to ensure proper ink ﬂow and transfer.
Inadequate or excessive blanket cylinder pressure and/or plate or blanket packing.
Check blanket cylinder pressures and/or ensure that plate and blanket packing are all to manufacturer’s speciﬁcations.
Rollers are the wrong durometer or improperly set.
Check roller settings, clean and condition / de-glaze rollers.
Verify densities are in normal range
Ink is poorly ground.
Check grind. Consult your ink supplier.
*The solutions provided from the troubleshooting guide are general in nature, please contact your sales or technical representative to discuss specific issues.
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