UV Fexographic Ink
UV flexographic ink is a UV-curable printing ink designed for flexographic printing systems used in label, packaging, and film-based printing applications.
It uses ultraviolet light as the curing method, forming a solid ink film immediately after exposure, which supports fast production speed and stable print output.
The ink system is formulated with UV-reactive resins, photoinitiators, pigments, and functional additives. It is designed for printing on non-absorbent and semi-absorbent substrates such as paper, plastic film, and coated materials.
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Product Introduction
Three Key Performance Factors
Fast UV curing response
The ink reacts quickly under UV exposure, forming a solid film within seconds, which supports continuous high-speed printing operations.
Stable rheology during printing
The ink maintains consistent viscosity under shear conditions in the anilox system, ensuring stable ink transfer and uniform dot formation.
Substrate adhesion control
The ink system is designed to bond with different surface energies, including treated plastic films and coated paper materials, reducing print defects such as ink peeling or poor anchoring.
Product Specification
Product Highlights
Instant curing efficiency
The ink cures immediately under UV exposure, eliminating drying time and supporting continuous high-speed production lines without waiting for evaporation or heat drying.
High-definition print stability
Controlled rheology allows precise ink transfer from anilox rollers, supporting sharp dot reproduction and consistent image definition on fine graphic designs.
Strong substrate adaptability
The formulation is optimized for multiple packaging materials, including treated plastic films and coated paper surfaces, ensuring stable adhesion performance after curing.
Low migration formulation option
Optional low-migration systems are available for food and pharmaceutical packaging applications, designed to meet strict regulatory requirements for indirect food contact printing.
Solvent-free system structure
The ink contains nearly 100% solid content, reducing volatile emissions during production and improving workplace operating conditions.
Stable color performance
Pigment dispersion is designed to maintain consistent color density across different production batches and long printing runs.
Common Interrogations
What substrates are suitable for UV flexographic ink?
This ink is suitable for treated plastic films such as PET, BOPP, PE, and also coated paper and paperboard materials used in packaging and label printing.
What is required for curing UV flexo ink?
A UV curing system is required, typically using medium-pressure mercury lamps or LED UV systems with wavelengths around 365 nm or 395 nm, depending on ink formulation.
Can UV flexographic ink be used for food packaging?
Yes, low-migration UV flexo ink systems are available for indirect food contact applications. Proper compliance testing and substrate selection are required based on regional regulations.
What happens if curing is insufficient?
Insufficient UV energy may lead to poor adhesion, surface tackiness, reduced scratch resistance, and incomplete polymerization of the ink film.
How should the ink be stored?
The ink should be stored in a sealed container at 5°C–30°C, away from heat sources and UV light exposure to prevent premature curing or performance degradation.
Can UV flexo ink be mixed with other ink types?
It is not recommended to mix UV inks with water-based or solvent-based ink systems, as this may affect curing behavior and film stability.
What printing speed can UV flexo ink support?
Printing speed depends on press configuration, UV curing power, and substrate type, but the system is designed to support high-speed flexographic production lines.
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