Dry milling and classification for pigments and inks.

Pigments are special substances and do not dissolve in a medium, so they must be well dispersed in the medium. Due to their optical properties, they are used as colour-forming substances, e.g. in paints, printing inks or inkjet inks, or as preservatives with special technical and chemical properties.

A first particle size reduction reduces the pigments and dyes to a medium particle size, corresponding to a D97 at 80µ. From this fineness, our process often includes a micro-selection phase before moving on to a micronisation phase.

Dyes are divided into inorganic and organic dyes, unlike pigments, they are totally soluble in their vehicle (water or organic solvent). They can be used to colour fibres (textile dyes), plastics and plastic fibres, and as colour-giving substances in food technology, such as beta-carotene in soft drinks.

Pigment solutions

Pigment solutions

The ultra-fine grinding of pigments and dyes places high demands on the process equipment technology used to ensure low residue, a low carbon footprint, fewer impurities, and easy cleaning. The POITTEMILL Group offers a wide range of techniques for all stages of dye and pigment processing, from pre-milling to ultra-fine milling and high-performance classification, meeting the standards of today’s and tomorrow’s manufacturers.

Pigment solutions

Sustainable processing solutions

Fully integrated solutions are the key to providing optimised processes that help you both reduce costs and make more sustainable use of valuable resources.

These systems are based on the principle of:
• Reliability and safety
• Low operating and maintenance costs
• Guaranteed hygienic, customer-oriented process solutions
• Easy cleaning
• Energy saving

The diverse characteristics of powders in these types of industries require a combination of engineering skills and experience to design quality systems to meet the expectations of today’s and tomorrow’s customers.

Pigment solutions

Among the main uses, we can mention:

• Toner
• Metal powders and components
• Pigments
• Coating powders
• Paints
• Inorganic pigments
• Natural dyes

Pigment solutions

Process testing and development

The POITTEMILL Group has its own scientific laboratory as well as a test center which is unique in France. It is in this test center that the dialogue between customers and the technical teams begins, but it is also here that detailed analyses of their raw materials are carried out to obtain complete information on the execution of the task set.

Our development and engineering team is always available to help you explore new and innovative processes and applications.

Our testing facilities offer exceptional opportunities to test ingredients, machines, parameters, and processes, whether in the laboratory, pilot or industrial scale, to ensure you achieve the necessary product quality and operating efficiency.

Pigment solutions

Type of tests

Classification - grinding

Test including drying

Test including inerting

Cryogenic test

Test including FORPLEX grinding equipment

Crushing and Screening Test

Pigment solutions

Particle size analysis

Hardgrove grindability index (HGI)

Laser particle size measurement - dry grinding / Lab Sieve

Moisture measurement

NIR analysis


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At the forefront of innovation, the POITTEMILL Group has been designing its own equipment for over 90 years, offering customized turnkey solutions.

Pigment solutions

Sustainable processing systems

In the context of the climate emergency, the environment is the strategic priority of the POITTEMILL Group. The Group approaches it with the ambition to offer processing technologies that maximise production efficiency while minimising your carbon footprint. In addition, our POITTEMILL Group dry powder processing technologies are developed to support and integrate a more sustainable life cycle.