First down ink is not fully dry
Increase drying speed of ink by: Reducing ink viscosity
Foreign object is dragging on wet print
Trace web and remove dragging object
Not wiping well, doctor blade issues
Reset doctor blades to correct contact angles, Replace blades- Check chamber balance side to side - in and out
Second down ink, top lacquer or adhesive is too rich causing first down ink to dissolve
Check second down material and reformulate for non-aggressive properties.
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