|Unstable Ink/Water Balance
|PROBLEM-Frequent on-press adjustment necessary to maintain print quality.
SYMPTOM-Solids or halftones may appear “washed out” and weak.
||Excessive fountain solution.
||Reduce dampener settings. Increase isopropyl alcohol
or alcohol substitute to reduce the amount of fountain solution needed
to keep the plate clean.
||Improperly formulated or prepared
||Adjust pH/conductivity to manufacturer’s
||Improper dampening roller setting.
Reset rollers. Check to see that the vibrator roller,
not the plate, drives the dampener form rollers.
||Improper ink form roller and durometer settings.
||Conduct an ink stripe test to determine form roller
pressure and check durometers with proper gauge.
||Improper ink fountain settings.
||Adjust fountain keys and sweep for proper balance.