Definition
The ability of ink to anchor to a substrate without flaking, smearing, or rubbing off during converting and end use.
Applications
- Flexo-printed films
- Reverse-printed laminates
- Abrasion-prone retail packs
Benefits
- Reduces scuffing
- Prevents label/graphic failure
- Improves appearance over shelf life
Industry Examples
- Medical: durable printed instructions that remain legible after handling.
- Industrial: hazard symbols that remain intact through abrasion in shipping.
- Electronics: ensures regulatory and ESD warning text remains legible after abrasion during shipping.
FAQ
Q: How do you test ink adhesion?
A: Tape tests, rub tests, and standardized abrasion evaluations.
Q: Why does adhesion fail after lamination?
A: Incorrect cure, low dyne, or incompatibility between ink and adhesive.