| Unstable Ink/Water Balance |
PROBLEM-Frequent on-press adjustment necessary to maintain print quality.
SYMPTOM-Solids or halftones may appear “washed out” and weak.
| probable
cause |
remedy |
| 1 |
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. |
| 2 |
Improperly formulated or prepared
fountain solution. |
Adjust pH/conductivity to manufacturer’s
specifications. |
| 3 |
Improper dampening roller setting. |
Reset rollers. Check to see that the vibrator roller,
not the plate, drives the dampener form rollers.
|
| 4 |
Improper ink form roller and durometer settings. |
Conduct an ink stripe test to determine form roller
pressure and check durometers with proper gauge. |
| 5 |
Improper ink fountain settings. |
Adjust fountain keys and sweep for proper balance. |
|
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