Offset – Mechanical/Paper problems: causes and fixes
12 Offset – Mechanical/Paper problems in offset printing and finishing: symptoms, probable causes, step-by-step fixes and prevention.
Offset – Mechanical/Paper · TPG-066
Variable registration (paper)
Registration wanders randomly between sheets
Offset – Mechanical/Paper · TPG-067
Doubling
Doubled dot or faint shadow image; plugged screen with no cause
Offset – Mechanical/Paper · TPG-068
Slurring
Elongated dots in the print direction; 'combed' text
Offset – Mechanical/Paper · TPG-074
Roller streaks
Bands parallel to the cylinder axis, periodic or not
Offset – Mechanical/Paper · TPG-069
Picking
White voids in solids; fibers on the blanket
Offset – Mechanical/Paper · TPG-070
Piling on the blanket
Ink/fiber deposit on the blanket degrading the image
Offset – Mechanical/Paper · TPG-071
Backside marking in the perfector
The printed first side marks while printing the second
Offset – Mechanical/Paper · TPG-072
Wrinkles in the sheet
Diagonal creases or wrinkles after printing
Offset – Mechanical/Paper · TPG-073
Double sheets / feeding failures
Stops from double sheets or skewed sheets at the feeder
Offset – Mechanical/Paper · TPG-075
Smashed blanket
Area printing weak or not at all, with defined outline
Offset – Mechanical/Paper · TPG-077
Mottling in solids
Solids with cloudy or uneven appearance
Offset – Mechanical/Paper · TPG-076
Static at delivery
Sheets sticking, poor piling, shocks to the operator