How is Ink Viscosity Controlled in a Unit-Type Flexo Press?

Unit-Type Flexo Presses are widely used for printing on a variety of substrates due to their versatility, high printing quality, speed and efficiency, cost-effectiveness, wide substrate compatibility, and environmentally friendly features. But, how is ink viscosity controlled in a unit-type flexo press? Ink viscosity is a crucial factor in the printing process as it affects ink transfer, print quality, and consistency. To understand how ink viscosity is controlled in a unit-type flexo press, we need to first understand the basic definition and product features.

Basic Definition and Product Features

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.


The advantages of Unit-Type Flexo Presses include:

  1. Versatility: Unit-Type Flexo Presses offer great flexibility and versatility in printing applications.
  2. High Printing Quality: Flexo Presses have made significant advancements in recent years, achieving excellent print quality comparable to other printing methods.
  3. Speed and Efficiency: Unit-Type Flexo Presses are known for their high production speeds.
  4. Cost-Effectiveness: Flexo printing, including unit-type flexo presses, is generally considered a cost-effective solution for medium to high-volume printing.
  5. Wide Substrate Compatibility: Unit-Type Flexo Presses are compatible with a variety of substrates, including paper, cardboard, films, labels, and flexible packaging materials.
  6. Environmentally Friendly: Flexo printing, including unit-type flexo presses, has made significant strides in reducing environmental impact.
  7. Inline Finishing Options: Unit-Type Flexo Presses can be equipped with various inline finishing options, such as laminating, die-cutting, embossing, and varnishing.
  8. Continuous Innovation: The flexographic printing industry is continuously evolving, with ongoing advancements in technology, materials, and processes.


Working Principle

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

  1. 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.
  2. Inking System: Anilox rollers transfer ink to the plate cylinder. The inking system consists of an ink fountain, doctor blade, and anilox roller.
  3. Impression Cylinder: The impression cylinder receives the substrate to be printed.
  4. Drying System: After the ink is transferred to the substrate, a drying system is employed to evaporate solvents or cure the ink.
  5. Repeatable Units: Unit-type flexo presses are designed with repeatable units, which can be combined to achieve multi-color printing.

Application Scenarios

Unit-Type Flexo Presses are widely used for printing on various substrates, including:

  1. Flexible Packaging: Unit-Type Flexo Presses are commonly used for printing on flexible packaging materials, such as plastic films and laminates.
  2. Corrugated Packaging: Flexo Presses are widely employed for printing on corrugated cardboard used in packaging boxes and containers.
  3. Labels and Tags: Flexo Presses are preferred for printing labels and tags used in various industries, including retail, logistics, and manufacturing.
  4. 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.
  5. Paper Products: Flexo Presses are suitable for printing on a wide range of paper products, including newspapers, magazines, catalogs, books, and stationery.


How to Select a Unit-Type Flexo Press?

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

  1. Printing Requirements.
  2. Flexibility and Customization.
  3. Print Quality and Registration.
  4. Production Speed and Efficiency.
  5. Substrate Compatibility.
  6. Inking and Drying Systems.
  7. Support and Service.
  8. Budget and Return on Investment.
  9. Industry Reputation and Reviews.
  10. Future Expansion and Upgrades.

Possible Issues and Solutions in the Use of Unit-Type Flexo Presses

During the use of unit-type flexo presses, some problems may arise, including:

  1. Ink Smearing or Blurring: Ensure proper ink viscosity and consistency; adjust the doctor blade pressure; verify that the anilox roller is clean and free from dried ink or debris; check for excessive plate wear or damage; optimize drying parameters.
  2. Registration Issues: Verify all mechanical adjustments; check for worn or damaged gears, cylinders, or rollers; ensure the plate cylinder and substrate tension are correctly set; align the printing plates accurately and securely; regularly clean and maintain the registration sensors and control systems.

Installation and Maintenance

When installing and maintaining a unit-type flexo press, follow these guidelines:


  1. Site Preparation: Ensure a suitable location with adequate space, ventilation, and access for the press installation; prepare a level and stable foundation to support the press’s weight and minimize vibrations; install necessary utility connections.
  2. Unpacking and Assembly: Carefully unpack the press components; assemble the press units according to the provided guidelines; install and align necessary mechanical components.
  3. Electrical and Control System Setup: Connect and wire the electrical components of the press; install and configure the control system.
  4. Testing and Calibration: Conduct a thorough testing and calibration process, following the manufacturer’s instructions.


  1. Regular Cleaning: Clean the press components on a regular basis; use appropriate cleaning solutions and methods; pay special attention to critical areas.
  2. Lubrication: Follow the manufacturer’s guidelines for lubricating the press components; use recommended lubricants; regularly inspect lubrication points.
  3. Inspection and Replacement: Conduct routine inspections of the press components; replace any worn or damaged parts promptly; keep a stock of essential spare parts.


Finally, if you are looking for a reliable and high-performance unit-type flexo press, look no further than EVER-POWER. Our company is a professional manufacturer of flexo presses, dedicated to the research and development of printing and packaging equipment, precision coating equipment, and special electromechanical equipment. EVER-POWER has a core technology group, including tension system coupling modeling and decoupling control technology, equipment intelligent control technology, precision coating composite technology, high-speed high-definition printing technology, coating curing and solvent residue control technology, and multi-material adaptive winding technology.




EVER-POWER has obtained ISO9001:2015 international quality system certification, SGS certification, and EU CE safety certification, and has a complete after-sales service system. Our products can replace other brand products, and we encourage customers to explore and purchase our products, which will help increase user stickiness and conversion rates.

Questions and Answers

  1. What is a Unit-Type Flexo Press?
    A Unit-Type Flexo Press is a type of printing press that uses 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, environmentally friendly features, inline finishing options, and continuous innovation.
  3. What are the potential issues that may arise in the use of Unit-Type Flexo Presses?
    The potential issues that may arise in the use of Unit-Type Flexo Presses include ink smearing or blurring and registration issues.
  4. How can ink viscosity be controlled in a Unit-Type Flexo Press?
    Ink viscosity can be controlled in a Unit-Type Flexo Press by adjusting the ink fountain, doctor blade, and anilox roller, and optimizing drying parameters.
  5. What factors should be considered when selecting a Unit-Type Flexo Press?
    When selecting a Unit-Type Flexo Press, factors such as 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 should be considered.