Moniotech Private Limited

Flexographic printing (Flexo printing) is a widely used printing method for producing custom labels, packaging labels, and stickers in large quantities. It uses flexible printing plates, fast-drying inks, and roll-to-roll printing technology to print on different materials such as paper, plastic, and film.

Step-by-Step Flexo Printing Process 1️⃣ Label Design Preparation

The first step is creating the custom label design on a computer using graphic design software.

The design may include:

• Brand logo

• Product name

• Product information

• Barcode or QR code

• Color graphics

• Manufacturing and expiry details

The design is prepared in separate color layers because each color will be printed using a different printing plate.

2️⃣ Plate Making

After finalizing the design, flexographic printing plates are made.

• Plates are usually made from photopolymer material.

• Each color requires one separate plate.

• The plate contains a raised image of the design.

These plates are mounted on printing cylinders inside the flexo machine.

3️⃣ Material Loading

Next, the label material roll is loaded into the machine.

Common label materials include:

• Paper labels

• PP (Polypropylene) film

• PET labels

• BOPP film

• Vinyl stickers

Some materials are used for waterproof labels.

4️⃣ Ink Transfer System

Flexo printing uses a special ink transfer system:

Ink travels through these parts:

Ink Fountain → Anilox Roller → Printing Plate → Label Material

• Ink fountain: Stores the printing ink

• Anilox roller: Controls the amount of ink

• Printing plate: Transfers the design onto the label material

The material moves continuously through the machine while printing.

5️⃣ Multi-Color Printing

Flexo machines have multiple printing stations.

Each station prints one color.

Example:
Station 1 → Yellow
Station 2 → Magenta
Station 3 → Cyan
Station 4 → Black

This process creates full-color custom labels.

6️⃣ Drying Process

After each color is printed, the ink must dry quickly.

Drying methods include:

• Hot air drying

• UV curing

This prevents smudging and keeps the print sharp.

7️⃣ Lamination (Optional)

For better durability, a lamination layer can be added.

Lamination provides:

• Waterproof protection

• Scratch resistance

• Longer label life

This is commonly used for cosmetic, food, and chemical product labels.

8️⃣ Die Cutting

After printing, the label roll goes through a die cutting process.

A metal die cutter cuts the labels into specific shapes such as:

• Rectangle

• Circle

• Oval

• Custom shapes

9️⃣ Slitting and Rewinding

Finally:

• Large rolls are cut into smaller rolls

• Rolls are rewound for packaging and shipment

These rolls are ready to be used in label applicators or barcode printers.

Advantages of Flexo Printing

• Very fast printing speed

• Cost-effective for large quantities

• Works on many materials

• High quality color printing

• Suitable for waterproof labels