How Does Flexographic Printing Work?

How Does Flexographic Printing Work?

Flexographic printing, often referred to as ‘flexo’, is a popular and versatile printing technique widely used in the packaging industry. But how exactly does this process work, and why is it favoured for so many applications?

How does Flexographic Printing work?

• The artwork is transferred onto a flexographic printing plate made from rubber or photopolymer material. The flexibility allows it to wrap around a cylindrical printing drum.
• Ink is then applied to the printing plate by a roller system, where the raised parts of the plate pick up the ink.
• The substrate (packaging material or label) is fed through the printing press, and the printing plate meets the material’s surface.
• After printing, the ink needs to dry quickly to avoid smudging or smearing, using hot air, UV curing systems, or LED curing.
• Additional finishing like laminating, cutting, and other converting processes are possible.

What is Flexographic Printing?

Flexographic printing is a form of rotary printing that uses flexible relief plates made from rubber or photopolymer. These plates are wrapped around cylinders on a printing press and can print on a variety of substrates, including paper, plastic, film, and even metallic foils.

Key Components of a Flexo Press

• Plate Cylinder: Holds the flexible printing plate.
• Anilox Roller: Delivers a precise amount of ink to the plate.
• Impression Cylinder: Presses the substrate against the plate for a clean print.
• Substrate Roll: Feeds the material (such as paper or film) through the press.

The Printing Process Explained

The process begins with the creation of the flexible plate, which features the image or text to be printed in raised relief. The plate is mounted onto the plate cylinder. An anilox roller, covered in tiny engraved cells, picks up ink from the ink tray and delivers a consistent, measured layer of ink to the plate. The plate then transfers the inked image onto the substrate as it passes through the press at high speed.

In summary, flexographic printing is a robust and adaptable method that delivers high-quality results for a variety of packaging needs. Its blend of speed, versatility, and cost-effectiveness ensures its continued popularity in the modern print industry.

Labelcraft are Irelands most trusted packaging manufacturer helping build global brands. Established in 1984 and joining The Asteria Group in 2022 we are based in Dundrum Dublin we are one of Irelands largest self-adhesive label, package and carton manufacturer, supplying to the pharmaceutical, healthcare, medical devices, cosmetic, veterinary and the food and drinks industry.