Blocking in the pile

High severity

Symptoms

Coated sheets sticking together in the pile or at the guillotine

Probable causes

  • Coating not fully dry
  • tall hot pile
  • thick film
  • high RH

The Print Guy · 2026-10-05

Other problems in this category

Water-based coating · TPG-146

Coating crawling over the ink (craters)

Fish eyes or zones the coating won't wet

High severity

Water-based coating · TPG-142

Orange peel

Rough orange-skin surface in the coating

Medium severity

Water-based coating · TPG-143

Low coating gloss

The gloss finish comes out matte or uneven

Medium severity

Water-based coating · TPG-145

Foam in the coating circuit

Bubbles leaving craters or uncoated voids

Medium severity

Water-based coating · TPG-147

Coating yellowing

Paper white turning yellowish after coating

Medium severity

Water-based coating · TPG-148

Streaks in the coating

Machine-direction lines in the coating film

Medium severity
All Water-based coating problems (8) →

Other categories

Wire/Spiral binding (7)Binding (hotmelt/PUR) (8)Blankets (7)