Process technologies for tomorrow.


Natural food colorants are foods in their own right and edible at any point in the production process. They are made from edible fruits, vegetables and plants and without the use of chemical solvents or additives. As consumers continue to demand natural ingredients that they can easily recognize and feel safe consuming, natural colors are ideally suited to meet this growing consumer requirement.

However, food colorants are notoriously difficult to handle in wet feed, slurry or cake, exhibiting poor flow characteristics and a cohesive tendency. They are also temperature sensitive. When these difficulties are added to the specific requirements for colour and taste, it becomes clear that it is critical to select the right dryer.

Typical application requirements

  • Feed material: slurry with a moisture content of approx. 85%
  • Required moisture content: generally < 10%
  • Product temperature: < 80°C
  • Particle size distribution: fine powder, no agglomerates

Ideal process solution

DMR flash mill dryer DMR flash mill dryer

Hosokawa's DMR flash drying system has been proven to be highly successful in drying slurries for the production of food colorants. The ultra-compact flash dryer combines drying, de-agglomeration/milling and classifying in one piece of equipment, drying temperature-sensitive products, safely, even under increased temperatures, in a matter of seconds! It delivers a lump free, defined particle size final product output.

The number of process steps (and therefore operational costs) is reduced when using a DMR flash dryer. By design, the DMR requires less thermal energy per kilogram of evaporated water than conventional ring dryers, resulting in further savings and a more environmentally friendly operation.

With the capability to handle moisture content fluctuations from a few % up to more than 80% in suspensions, slurries, pastes, dough, filter cakes and wet powders it uses about 10-20% less energy per kilogram of evaporated water than ring dryers.

Built-in milling section

The milling section in the bottom part of the dryer is designed to give optimal grinding of the wet material. Products obtained from a traditional dryer contain unwanted agglomerates, so that an additional milling step is required after drying. This additional process step is not necessary when the DMR is used, saving you time and costs.

Drying & classifying in one step

Combining several unit operations in the dryer simplifies the process and reduces operational cost. With the introduction of the DMR flash dryer even the most difficult products can be very efficiently dried and classified in one step to a fine and uniform product.


Test Centre in Doetinchem, the Netherlands Test Centre in Doetinchem, the Netherlands

Our test and process development centre in the Netherlands offers unique possibilities for testing your product to determine the most efficient process, system or plant prior to final design. We can provide laboratory-level as well as production-sized trials.

Whether you wish to test a single machine or a complete powder processing system, the same skilled and experienced staff are here to help ensure that your requirements are met, and that you are entirely satisfied with the results.

We offer process equipment and technologies from individual units to large scale bespoke system solutions. Our principle is to deliver high performance yet affordable solutions that meet our customers' demands and long term challenges.


To learn more about our powder process equipment and systems for food colorants, contact us:



Hosokawa Micron B.V. is certified according to ISO 14001. Our certification covers all environmental themes of ISO 14001: air, soil, energy, waste, water, noise and hazardous substances. In addition, Hosawa Micron was awarded an EcoVadis Silver Medal for its sustainability achievements. EcoVadis determined that the company was among the top 7% of companies rated by EcoVadis in the special machinery industry.

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