Uni-Nam Labels

The Flexo Process

How Flexographic Label Printing Works in Namibia

Understanding flexographic printing: process, materials, and advancements. Flexographic printing — often called “flexo” — is a widely used printing technique known for its versatility, efficiency, and ability to print on a range of materials. From food packaging to corrugated boxes, flexo has evolved significantly, offering high-speed production and sustainability benefits.

The Flexographic Printing Process

Flexographic printing follows a well-defined process that ensures precision and efficiency.

1. Artwork Preparation

Designing the artwork is the first step. The image carrier (printing plate) must be carefully proofed before production because modifications cannot be made after it is created. As the plate mounts onto the printing cylinder, adjustments must be made to counteract distortion caused by stretching.

2. Substrate Feeding

A continuous roll of material (substrate) is fed into the press, enabling non-stop printing at high speeds. This setup ensures efficient handling and accuracy during large print runs.

3. The Printing Press Operation

Flexographic presses consist of multiple components working together to transfer ink onto the substrate with precision.

Unwind & Infeed

The material roll is fed into the press while maintaining optimal tension to prevent defects like misalignment or web breaks.

Ink Transfer System

Ink cycles through a controlled chamber using a pump system. A doctor blade ensures precise ink application by removing excess from the anilox roller.

Anilox Roller

This roller holds microscopic cells that regulate ink distribution to the printing plate.

Image Carrier & Impression Cylinder

The image carrier transfers ink onto the substrate with just the right amount of pressure applied by the impression cylinder.

Drying Process

Ink dries between passes through rollers, ensuring sharp and smudge-free prints.

Outfeed & Rewind

The printed material is rolled back for further processing, such as cutting or finishing.

Materials & Ink Used in Flexographic Printing

Substrates

  • Paper — labels, cartons, and packaging
  • Plastic Films — flexible packaging like bags and wraps
  • Foil — durable prints for food and pharmaceuticals
  • Corrugated Board — shipping and storage
  • Textiles & Fabrics — some flexo applications extend to non-woven materials

Ink Types

  • Water-Based Inks — suitable for porous surfaces like paper, offering eco-friendly benefits
  • Solvent-Based Inks — ideal for non-porous materials like plastic and foil
  • UV-Curable Inks — quick drying and vibrant colour precision
  • Biodegradable Inks — made from sustainable sources for environmentally conscious packaging

Types of Flexographic Printing Setups

Flexo printing adapts to different production needs.

Central Impression Cylinder Press

Ensures high registration accuracy for flexible packaging.

Inline Flexo Press

Ideal for processes involving laminating and die-cutting.

Stack Flexo Press

Compact setup for printing on both sides of a material.

Digital Flexo

Combines digital printing with flexographic technology for small-batch customisation.

Advantages of Flexographic Printing

High-Speed Production
ideal for bulk printing
Versatility in Substrates
works with various materials
Cost-Effectiveness
efficient for large runs due to plate longevity
Eco-Friendly Options
supports sustainable inks and recyclable materials
Fast Drying Time
prevents smudging for quick turnaround
High Print Quality
enhanced with modern inks and anilox technology

Applications of Flexographic Printing

Flexo is widely used across industries.

  • Packaging — from food wraps to pharmaceutical labels
  • Labels & Stickers — high-quality self-adhesive prints
  • Corrugated Boxes — branding and shipping
  • Newspapers & Magazines — efficient large-scale printing
  • Paper Goods — common in disposable products

Recent Innovations

Advancements in flexo printing have made it more efficient and environmentally friendly.

  • Digital Flexo Integration — enables customised and small-batch runs
  • Eco-Friendly Inks — supports sustainable printing practices
  • Advanced Anilox Rollers — improves ink application precision

Looking Ahead: The Future of Flexographic Printing

As printing technology advances, flexo is expected to integrate more automation, digital flexibility, and sustainability efforts. Hybrid digital-flexo presses will allow personalised packaging while maintaining high-volume production capabilities.

Eco-conscious printing will drive industry standards toward biodegradable inks and recyclable substrates, shaping the next era of flexographic innovation. We trust that you will now have a better understanding of flexographic printing options.

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