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A New Solid Tinting System
A PCI interview with Peter Thommassen, R&D Manager, Vibrantz
A new, volumetrically dosed, solid colorant tinting system designed for use in waterborne architectural and industrial applications has recently been developed by Vibrantz Technologies. Introduced in Europe in 2022, the company installed the first dispensing machine for this new technology in the United States in October of last year. Vibrantz produced 70,000 liters of the new product in 2024 and is ramping up production to a capacity of 1.2 million liters per year with the help of a new colorant plant in Sittard, the Netherlands, expected to be operational in 2026.
PCI Magazine recently interviewed Peter Thommassen, R&D manager at Vibrantz, about the incentive and process behind this new technology.

Peter Thommassen
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To address these issues, our team developed an innovative solid tinting system called Pearls. The goal was to create a solution that not only resolved these problems but was also user-friendly — similar to a coffee machine. The colorant dissolves quickly and is dosed volumetrically, offering a practical and efficient alternative to traditional liquid tinting systems.
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Next, this liquid feed is drip-cast into a tall tower cooled with liquid nitrogen. As the droplets fall, they freeze and are collected at the bottom on a sieve, where we separate the usable product from particles that are too large or small. The frozen particles are then placed in a freeze dryer, where the ice (water) is removed through sublimation, leaving behind dry, porous Pearls. Finally, they are packaged in 2-liter recycled PET bottles, ready for use.
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This is due to factors such as reduced waste, a longer shelf life, fewer raw materials in the formulation and a higher pigment load, making the new solid tinting system a more sustainable solution in the long run.
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This is due to factors such as reduced waste, a longer shelf life, fewer raw materials in the formulation and a higher pigment load, making the new solid tinting system a more sustainable solution in the long run.

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Faster operation: Volumetric dosing allows for simultaneous dispensing of multiple colors, while gravimetric dosing can only handle one color at a time, as it requires a scale. This makes volumetric dosing much faster.
Cost efficiency: An accurate scale for gravimetric dosing is expensive and slow, which would increase the cost of the tinting machine compared to current liquid dispensers.
Lower maintenance: Our volumetric dispensers rely on gravity, eliminating the need for costly pumps or scales. This reduces the cost of dispensers and makes them more robust, requiring much less maintenance.
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In Germany, a growing demand for biocide-free paints created the perfect opportunity, as our solid tinting system is naturally biocide-free. Additionally, in Europe, stricter regulations aimed at reducing the use of biocides and limiting certain types of chemicals further accelerated the adoption of Pearls.
Finally, the ease of use and low maintenance of the new dispenser, compared to traditional dispensers, made it an even more attractive solution, driving the popularity of this new concept.
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FIGURE 1–ǀ–Hardness test in number of pendulum movements.

In traditional liquid tinting systems, we sometimes observe a reduction in the hardness of the tinted paint. However, when using this new tinting technology, there is no significant impact on hardness. Similarly, scrub resistance can deteriorate when paint is tinted with a liquid system, whereas paint tinted with Pearls maintains its original scrub resistance with no notable decline.
FIGURE 2–ǀ–Scrub resistance test film layer wear absolute (gr).

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There are certainly many more applications beyond architectural waterborne coatings where Pearls can be used. Ultimately, our goal is to develop a universal technology that works across both water- and solvent-based coatings, making it suitable for a wide range of architectural and industrial applications.