Rollers problems: causes and fixes
7 Rollers problems in offset printing and finishing: symptoms, probable causes, step-by-step fixes and prevention.
Rollers · TPG-085
Hard or glazed rollers
Irregular transfer, streaks, misting; shiny smooth rubber
Rollers · TPG-086
Badly set stripes
Uneven contact bands; irregular inking, plate wear
Rollers · TPG-088
Calcium deposits on rollers
Rough whitish surface; roller 'rejects' ink; tinting
Rollers · TPG-087
Deformed roller (out of round)
Vibration, periodic band once per roller revolution
Rollers · TPG-090
Roller slipping (not driven)
Band without transfer; squealing; accelerated wear
Rollers · TPG-091
Roller swelling from wrong wash
Increased diameter, altered pressures across the train
Rollers · TPG-089
Dry or overheated roller ends
Inkless tips, dry bands at format edges
Other categories
Binding (hotmelt/PUR) (8)Blankets (7)Die-cutting/Cracking (12)Feeder/Delivery (9)Folder-gluer (18)Folding (12)Fountain solution (10)Gathering/Stitching/Gluing (10)Grippers/Sheet travel (8)Guillotine/Cutting (6)High rulings/Stochastic (12)Hot foil (7)Ink (material) (12)Inking calibration (6)Lamination (5)Metallized (9)Offset – Ink/Water (14)Offset – Mechanical/Paper (12)Paper/Board (10)Plates (CTP) (7)Polyboard/Corona (14)Prepress (10)Pressroom climate (5)Stripping (8)Substrates GC/Bond/Coated (11)Three-knife trimmer (8)UV coating (7)Water-based coating (8)Wire/Spiral binding (7)