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Marking colors, inks and media in industrial marking technology

In industrial marking technology, the media used play a central role. Unlike traditional printing or coating inks, they not only serve aesthetic purposes but also perform functions related to process control, quality assurance, and component identification.

Modern marking systems therefore use functional process media that are specifically applied to workpieces in order to:

  • making quality conditions visible
  • to manage production processes
  • to uniquely identify components
  • to prepare for subsequent steps
  • treating surfaces in a targeted manner

Marking colors or marking inks?

The choice of the right medium depends on visibility, precision, and process requirements.

A typical feature of this process is the handling of media with very different properties - ranging from low-viscosity inks to high-viscosity paints, varnishes or adhesives.

Marking colors - durable 
and clearly visible

Marking colors and marking varnishes are used wherever a clearly visible and permanently adherent marking is required.

Typical characteristics

  • high opacity and good visibility
  • process-dependent, often rapid drying
  • reliable adhesion to difficult surfaces 
    (z.B. oily, rough or hot matrials)
  • high temperature resistance, depending on the model
  • suitable for large-area markings that can be read from a distance

Marking inks - precise 
and quick-drying

Inks are generally more fluid and are used when high precision and speed are essential. 

Typical characteristics

  • excellent dosing precision at high production speeds
  • precise dot and line markings
  • quick drying
  • often solvent-based (e.g., alcohol, acetone, MEK)
  • alternatively, water-based versions are also available
  • good adhesion to many industrial surfaces

Types of marking colors

Different types of colors are used depending on the requirements:

  • standard pigmented colors
  • fluorescent colors for optical recognition systems
  • UV-reactive marking colors
  • removable marking colors for temporary marking
  • high temperature-resistant marking colors 
    • up to approx. 650 °C (refractory)
    • up to 1000-1400 °C (hot marking)

Types of marking inks

  • solvent-based inks
  • water-based inks
  • fast-drying industrial inks
  • UV-reactive inks
  • pigment-based or dye-based systems

Typical applications

Marking colors are used particularly in areas where high visibility and durability are required:

The steel and metal industry, particularly where hot materials are involved.
 

Wood and paper industry: sorting and quality markings
 

Packaging and logistics for labelling and process control

Typical applications

Inks are primarily used in situations where fine and quick markings are required:

Electronics industry, e.g. in the manufacture of printed circuit boards and components

Mechanical engineering, for example for serial numbers or codes

Packaging industry for coding and labelling

Special media in marking technology

In addition to traditional marking media, functional materials that perform additional tasks are also used in industrial practice.

Process media

These media support production processes or prepare surfaces in a targeted manner: 

  • primer (adhesion promoter)
  • protective coatings and sealants
  • seperating agents
  • lubrications
  • oils

Working Fluids

These materials perform active functions within the process:

  • adhesives and sealants
  • resins for encapsulation or protection
  • flux in electronics manufacturing

→ this means that marking technology is integrated directly into the manufacturing process and performs tasks that go beyond mere marking.

Requirements for marking media

Choosing the right media is crucial for the quality and reliability of the marking process.

Key requirements include: 

  • reliable adhesion to challenging surfaces (e.g., oily, dusty, or hot materials)
  • customized drying behavior (quick-drying or with a specified open time)
  • good visibility on various materials
  • suitable for camera-based recognition systems
  • reliable performance under industrial conditions
  • resistance to UV radiation and weathering

Conclusion

Marking colors, inks and other process media are a key component of industrial marking technology. They play a key role in determining the visibility, durability and functionality of a marking.

The key lies in the coordinated interplay between: 

  • suitable marking media
  • appropriate application technique
  • and the relevant process requirements

This is the only way to achieve stable, reproducible and reliable results.

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