Ink Piling

Ink becomes over emulsified. This causes the pigment to separate due to insufficient tack and viscosity

Run less fountain solution. Consult your Sun Chemical representative if problem persists. IPA concentration lower

Rollers are wrong durometer; rollers are improperly set; blanket is under packed or badly conditioned.

Use proper rollers and blankets. Check roller setting and blanket packing, or clean and condition

Ink is poorly ground

Consult your Sun Chemical representative

Ink roller train is too cool

Adjust oscillator surface temperature to 80°-85° F

Fountain solution pH and/or conductivity is incorrect

Check and adjust to supplier recommendations

Ink lacks sufficient lubrication or is unstable

Consult your Sun Chemical representative

Ink tack is too high

Reduce tack only enough to eliminate piling; excessively low tacks will cause other problems

UV inks are piling on down lane blankets when curing interstation

Impression is set too high, normally due to surface on uncoated paper causing poor solid ink lay; increased impression fills voids in substrate but causes piling. Can be treated as a result of poor cure due to old bulbs or dirty reflectors

UV/EB inks are piling on down lane blankets

Running too much water in previous units. Reduce ink/water setting in previous units

Substrate is dirty

Clean or change substrate