Can a Unit-Type Flexo Press Be Used for Printing on Paperboard?

Flexographic printing has become increasingly popular in recent years due to its ability to print on a wide range of substrates, including paper, films, and cardboard. In this article, we will explore whether a unit-type flexo press can be used for printing on paperboard, its basic definition and product features, advantages, working principle, application scenarios, how to choose, potential problems and solutions, and introduce EVER-POWER, a professional manufacturer of flexo presses. Let's get started!

What Is a Unit-Type Flexo Press?

A unit-type flexo press is a type of printing press used in the flexographic printing process. It is designed with modular units that can be combined and configured according to specific printing requirements. Each unit of the press consists of various components, such as a plate cylinder, anilox roller, inking system, and impression cylinder, which work together to transfer ink onto the printing substrate.

Advantages of Unit-Type Flexo Presses

Unit-type flexo presses offer several advantages:


Unit-type flexo presses offer great flexibility and versatility in printing applications. The modular design allows for easy customization and configuration of the press based on the desired printing process, substrate, and colors required. This adaptability makes it suitable for a wide range of industries and products.

High Printing Quality

Flexo presses have made significant advancements in recent years, achieving excellent print quality comparable to other printing methods. The unit-type flexo press provides precise control over ink transfer, registration, and color consistency, resulting in sharp, vibrant, and high-resolution prints.

Speed and Efficiency

Unit-type flexo presses are known for their high production speeds. They can handle rapid printing tasks, making them suitable for large-scale printing operations. Additionally, quick setup times and fast changeovers between jobs contribute to improved efficiency and reduced downtime.


Flexo printing, including unit-type flexo presses, is generally considered a cost-effective solution for medium to high-volume printing. The presses utilize flexible printing plates, which are more affordable compared to other plate types. Additionally, the ability to print on a wide range of substrates reduces the need for additional printing processes, resulting in cost savings.

Wide Substrate Compatibility

Unit-type flexo presses are compatible with a variety of substrates, including paper, cardboard, films, labels, and flexible packaging materials. This versatility allows for printing on different materials, expanding the range of applications and market opportunities.

Environmentally Friendly

Flexo printing, including unit-type flexo presses, has made significant strides in reducing environmental impact. Water-based and UV-curable inks are commonly used, which have lower volatile organic compound (VOC) emissions compared to traditional solvent-based inks. Additionally, advancements in energy-efficient drying systems contribute to sustainability efforts.

Inline Finishing Options

Unit-type flexo presses can be equipped with various inline finishing options, such as laminating, die-cutting, embossing, and varnishing. This eliminates the need for separate post-printing processes, reducing production time and costs.

Continuous Innovation

The flexographic printing industry is continuously evolving, with ongoing advancements in technology, materials, and processes. Unit-type flexo presses benefit from these innovations, allowing printers to stay competitive and meet the changing demands of the market.

Working Principle of Unit-Type Flexo Presses

The working principle of a unit-type flexo press involves several components:

Plate Cylinder

The unit-type flexo press has a plate cylinder with a flexible printing plate attached to it. The plate cylinder holds the image or artwork to be printed.

Inking System

Anilox rollers transfer ink to the plate cylinder. The inking system consists of an ink fountain, doctor blade, and anilox roller. The doctor blade ensures an even layer of ink is applied to the anilox roller, which then transfers the ink to the plate cylinder.

Impression Cylinder

The impression cylinder receives the substrate to be printed. It presses the substrate against the plate cylinder, allowing the ink from the plate to transfer onto the substrate.

Drying System

After the ink is transferred to the substrate, a drying system is employed to evaporate solvents or cure the ink. Drying can be achieved through various methods, such as heated air, UV lamps, or infrared radiation.

Repeatable Units

Unit-type flexo presses are designed with repeatable units, which can be combined to achieve multi-color printing. Each unit consists of a plate cylinder, anilox roller, inking system, and impression cylinder. The units can be adjusted and synchronized to ensure accurate registration and color consistency.

Application Scenarios of Unit-Type Flexo Presses

Unit-type flexo presses are suitable for various printing applications, including:

Flexible Packaging

Unit-type flexo presses are commonly used for printing on flexible packaging materials, such as plastic films and laminates. They are suitable for applications like food packaging, pouches, bags, wrappers, and labels.

Corrugated Packaging

Flexo presses are widely employed for printing on corrugated cardboard used in packaging boxes and containers. Unit-type flexo presses can handle the large format and high-volume requirements of the corrugated packaging industry.

Labels and Tags

Flexo presses are preferred for printing labels and tags used in various industries, including retail, logistics, and manufacturing. Unit-type flexo presses enable high-quality, durable, and customizable printing on different label materials.

Folding Cartons

Unit-type flexo presses are utilized for printing on folding cartons, commonly used in the packaging of consumer goods, cosmetics, pharmaceuticals, and other products. They offer efficient production speeds and excellent print quality for intricate designs and vibrant colors.

Paper Products

Flexo presses are suitable for printing on a wide range of paper products, including newspapers, magazines, catalogs, books, and stationery. Unit-type flexo presses can handle high-speed printing and large print volumes required in the paper industry.

How to Choose a Unit-Type Flexo Press?

When selecting a unit-type flexo press, consider several factors:

Printing Requirements

Determine the printing requirements, such as colors, resolution, and substrate type and thickness.

Flexibility and Customization

Assess the flexibility and customization options of the press, including the number and type of printing units, inline finishing capabilities, and automation features.

Print Quality and Registration

Evaluate the print quality and registration accuracy of the press, including the ink transfer, color consistency, and registration control systems.

Production Speed and Efficiency

Consider the production speed and efficiency of the press, including the setup and changeover times, print speed, and substrate handling capabilities.

Substrate Compatibility

Verify the substrate compatibility of the press, including the range of substrates it can handle, and the suitability for specific applications.

Inking and Drying Systems

Examine the inking and drying systems of the press, including the ink formulation, viscosity, and curing method, and the drying speed and efficiency.

Support and Service

Check the level of support and service provided by the press manufacturer, including training, technical assistance, and spare parts availability.

Budget and Return on Investment

Consider the budget and return on investment of the press, including the initial cost, operating expenses, and potential revenue and cost savings.

Industry Reputation and Reviews

Research the industry reputation and reviews of the press manufacturer and product to gauge overall quality and customer satisfaction.

Future Expansion and Upgrades

Anticipate future expansion and upgrades of the press, including the ability to add or replace units, retrofit new technology, and adapt to changing market demands.

Potential Problems and Solutions of Unit-Type Flexo Presses

When using a unit-type flexo press, you may encounter several issues and potential solutions:

Ink Smearing or Blurring

Problem: Ink smearing or blurring can occur during the printing process, leading to poor print quality and reduced clarity of the printed image.


  • Ensure proper ink viscosity and consistency.
  • Adjust the doctor blade pressure to achieve a clean and even ink transfer.
  • Verify that the anilox roller is clean and free from dried ink or debris.
  • Check for excessive plate wear or damage and replace if necessary.
  • Optimize drying parameters to ensure proper ink curing.

Registration Issues

Problem: Registration problems result in misalignment of colors or images, causing a distorted or offset print.


  • Verify that all mechanical adjustments, such as gear settings and tension controls, are properly calibrated.
  • Check for worn or damaged gears, cylinders, or rollers and replace as needed.
  • Ensure the plate cylinder and substrate tension are correctly set.
  • Align the printing plates accurately and securely on the plate cylinder.
  • Regularly clean and maintain the registration sensors and control systems.

Installation and Maintenance of Unit-Type Flexo Presses

Installing and maintaining a unit-type flexo press involves several steps:


  1. Ensure a suitable location with adequate space, ventilation, and access for the press installation.
  2. Prepare a level and stable foundation to support the press's weight and minimize vibrations.
  3. Install necessary utility connections, such as electrical power, compressed air, and water supply, as per the press specifications.
  4. Carefully unpack the press components, following the manufacturer's instructions.
  5. Assemble the press units, including the printing units, drying systems, infeed, and outfeed sections, according to the provided assembly guidelines.
  6. Connect and wire the electrical components of the press, adhering to the electrical safety guidelines and local regulations.
  7. Install and configure the control system, including the operator interface, sensors, motors, and drives, ensuring proper communication and functionality.
  8. Conduct a thorough testing and calibration process, following the manufacturer's instructions.


  1. Clean the press components, such as cylinders, rollers, and ink systems, on a regular basis to remove ink residues, debris, and contaminants.
  2. Follow the manufacturer's guidelines for lubricating the press components to ensure smooth operation and prevent excessive wear.
  3. Conduct routine inspections of the press components, such as gears, bearings, belts, and sensors, to identify signs of wear, damage, or misalignment.
  4. Replace any worn or damaged parts promptly to prevent further issues and maintain optimal performance.

Introduction to EVER-POWER

EVER-POWER is a professional manufacturer of printing and packaging equipment, precision coating equipment, and special electromechanical equipment. The company is based on the transformation and application of aerospace optoelectronic technology and relies on precision machining and manufacturing capabilities. EVER-POWER has a core technology group that has obtained over 239 national patents and more than 10 national high-tech achievement awards.

EVER-POWER's main products include printing equipment, precision coating equipment, new energy and new material production lines, complete sets of water treatment film materials production lines, complete sets of decorative materials production lines, intelligent production lines, and precision processing businesses. The company has obtained ISO9001:2015 international quality system certification, SGS certification, and EU CE safety certification, and has a complete after-sales service system.

EVER-POWER's flexo presses are designed to be adaptable and customizable, offering excellent print quality, production speed, and substrate compatibility. The company's innovative technology and commitment to sustainability make its products a cost-effective and environmentally friendly solution for various printing applications. Choose EVER-POWER for your printing needs and experience the difference in quality and efficiency.

Explore the possibilities of flexographic printing with EVER-POWER's unit-type flexo presses. Contact us today to learn more!

Questions and Answers

  1. What is a unit-type flexo press?
    A unit-type flexo press is a type of printing press used in the flexographic printing process. It is designed with modular units that can be combined and configured according to specific printing requirements.
  2. What are the advantages of unit-type flexo presses?
    The advantages of unit-type flexo presses include versatility, high printing quality, speed and efficiency, cost-effectiveness, wide substrate compatibility, environmental friendliness, inline finishing options, and continuous innovation.
  3. What are the application scenarios of unit-type flexo presses?
    Unit-type flexo presses are suitable for various printing applications, including flexible packaging, corrugated packaging, labels and tags, folding cartons, and paper products.
  4. How to choose a unit-type flexo press?
    When selecting a unit-type flexo press, consider several factors, including printing requirements, flexibility and customization, print quality and registration, production speed and efficiency, substrate compatibility, inking and drying systems, support and service, budget and return on investment, industry reputation and reviews, and future expansion and upgrades.
  5. What are the potential problems and solutions of unit-type flexo presses?
    Potential problems with unit-type flexo presses include ink smearing or blurring and registration issues. Solutions include adjusting ink viscosity and consistency, optimizing drying parameters, and ensuring proper mechanical adjustments and calibration.