UV coating problems: causes and fixes
7 UV coating problems in offset printing and finishing: symptoms, probable causes, step-by-step fixes and prevention.
UV coating · TPG-150
Incomplete cure
Tacky coating, strong odor, scratches with a nail
UV coating · TPG-151
Poor UV adhesion over ink
Coating peels with tape or at folding; flakes
UV coating · TPG-152
UV wrinkling
The UV film wrinkles or folds over fresh ink
UV coating · TPG-155
UV cracking at folding/die-cutting
White cracks at folds and cuts
UV coating · TPG-153
Residual odor in the product
Characteristic smell persisting after curing
UV coating · TPG-154
Uneven UV gloss
Alternating matte and glossy zones
UV coating · TPG-156
Fish eyes in spot UV
Circular uncoated dots within the motif
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)Rollers (7)Stripping (8)Substrates GC/Bond/Coated (11)Three-knife trimmer (8)Water-based coating (8)Wire/Spiral binding (7)