Definition
An opaque ink layer used as an underprint to create contrast and color fidelity on clear or metallized substrates.
Applications
- Reverse-printed pouches
- Metallized films
- Windowed designs requiring opacity control
Benefits
- Improves color pop
- Hides product behind graphics
- Enables consistent brand colors
Industry Examples
- Medical: white backer to increase legibility of critical text and symbols.
- Industrial: high-opacity white for bold contrast on consumer-facing packs.
- Electronics: provides opacity beneath warning symbols to ensure high contrast on metallized ESD films.
FAQ
Q: Why does white look gray sometimes?
A: Insufficient opacity, wrong anilox volume, or substrate show-through.
Q: Does white ink affect barrier?
A: Not directly, but it can impact optics and heat absorption.