How pilot plants accelerate innovation in crystallisation R&D

The fat-processing industry is evolving faster than ever. New oils and specialty fats, shifting regulations, clean-label demands, and sustainability pressures are driving producers to develop innovative margarine, shortening, and specialty fat products – and to do so with speed and precision.

In this fast-moving landscape, companies must test new formulations rapidly, minimise risk, and be able to fail cheaply in order to stay competitive. Pilot plants have become essential tools for achieving these goals. By replicating industrial-scale crystallisation and processing on a small, flexible scale, they allow R&D teams to experiment, optimise, and troubleshoot without consuming large volumes of raw materials or interrupting production lines.

Gerstenberg Services’ Polaron Margarine Pilot Plant exemplifies this approach. Designed as a fully equipped, modular small-scale line, it gives R&D teams the control, accuracy, and scalability they need to accelerate development, reduce cost and waste, and confidently translate pilot results into successful full-scale production.

In this article, we’ll explore the role of pilot plants in fat crystallisation innovation, key challenges in developing margarine and fat-based products, and how the Polaron Pilot Plant accelerates R&D.

Developing new margarine, shortening, and specialty fat products requires more than tweaking a recipe: it demands understanding how fats behave under precise thermal and mechanical conditions. Pilot plants provide a small-scale, fully equipped processing line that replicates industrial crystallisation behaviour in a manageable, cost-effective format.

 By using only a fraction of the ingredients, pilot-scale trials reduce raw material waste, energy use, and downtime. Manufacturers can experiment continuously, refine parameters quickly, and troubleshoot issues before scaling up, accelerating development cycles and lowering the risk of costly errors at full scale.

 Fat crystallisation is particularly complex. Polymorphism, cooling curves, emulsifier interactions, fat blends, and mechanical working all influence crystal formation, texture, and stability. Pilot plants give R&D teams a controlled environment to study these variables and understand how they interact under real processing conditions.

 Equally important is reproducibility. A well-designed pilot plant mirrors the pressures, shear forces, and cooling dynamics of industrial equipment, ensuring that insights gained at small scale translate reliably to full-scale production. This makes pilot plants an indispensable tool for bringing new fat-based products to market efficiently and confidently.

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Because margarine, shortening, and specialty fat products rely on precise crystallisation behaviour and tightly controlled processing conditions, even minor formulation changes can create big differences in texture, stability, and performance.

Some of the most common challenges in their development include:

• Selecting and balancing fats with different crystallisation speeds: Hardstocks, liquid oils, and specialty fractions all crystallise at different rates, so finding the right combination to achieve the target structure is a constant balancing act.
• Ensuring stable emulsions across temperature ranges: Margarine must withstand storage, transport, and usage conditions without breaking. Emulsion stability becomes especially challenging when working with temperature-sensitive oils or low-emulsifier formulations.
• Achieving the ideal plasticity, spreadability, or aeration: Different applications require different textures – a bakery shortening, for instance, must behave differently from a table spread or whipping fat. Each target property relies on a specific crystal network.
• Reformulating due to supply changes (e.g. palm alternatives): Shifts in availability, sustainability goals, or regulatory pressure often require replacing or reducing key fats. These substitutions rarely behave the same way in crystallisation.
• Meeting regional or retailer-specific performance requirements: Spreadability at fridge temperature, melting point, colour, taste, and functionality can differ by market, adding another layer of complexity.
• The high cost and risk of testing on full-scale lines: Trialling new recipes directly on production equipment risks long changeover times, wasted raw materials, and potential disruption to commercial output.

These challenges make controlled, small-scale experimentation essential. A well-equipped pilot plant gives R&D teams the freedom to experiment rapidly, de-risk new formulations, and build the confidence needed before scaling up to full production.

The Polaron Margarine Pilot Plant is designed to give R&D teams the freedom to experiment rapidly while maintaining the precision and control of a full-scale industrial line. By combining small-scale efficiency with production-level accuracy, it transforms the way margarines, shortenings, and specialty fat products are developed.

Small-scale testing with industrial-level accuracy

At the core of the pilot plant is the Polaron pilot SSHE: a compact, high-pressure scraped surface heat exchanger built on the same technology as full-scale production equipment. With up to four cooling cylinders, CO₂ or NH₃ refrigerants, and working pressures up to 120 bar, it mirrors real processing conditions, ensuring that pilot-scale results are truly scalable.

The setup also includes a high-pressure pump and modular pilot pin rotor machine, enabling R&D teams to fine-tune crystallisation, texture, and product structure with exceptional precision. This means every trial generates data that can confidently guide scale-up decisions.

Modular setup for tailored experiments

Every formulation is different, and the Polaron pilot plant is built to adapt. Its modular design allows teams to assemble exactly the processing line they need for a given trial. Optional units can be added or removed depending on the experiment.

These include:

• Resting tube
• Pilot homogenising arrangement
• Emulsion preparation system
• Mobile pilot tanks

This flexibility makes it easy to test new fatty acid blends, work with alternative oils, simulate different cooling curves, or troubleshoot crystallisation behaviour without touching the main production line.

Reduced cost, reduced risk, and faster iteration

Running trials on a full-scale line consumes significant quantities of raw materials, ties up production time, and increases the risk of off-spec product. With the Polaron Margarine Pilot Plant, you can:

• Experiment using minimal raw materials
• Cut energy and cleaning costs
• Reduce downtime on commercial lines
• Iterate rapidly through multiple recipe variations

The result is shorter development cycles, lower cost per trial, and a smoother, more predictable path from first concept to full-scale launch.

In short, the Polaron Margarine Pilot Plant gives you the agility to innovate quickly – and the confidence that your results will scale reliably to industrial production.

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One of the biggest challenges in margarine and fat-based product development is ensuring that what works in the lab also works on the factory floor. Crystallisation is sensitive to even small changes in pressure, shear, residence time, and cooling rates, meaning that results from bench-top equipment often fail to translate reliably to full-scale production. This is where the design of the Polaron Margarine Pilot Plant makes a critical difference.

Why pilot results don’t always scale – and how the Polaron design solves it

Traditional pilot setups often lack the pressure capability, cooling efficiency, or shear dynamics of industrial systems. As a result, the crystal structure formed during pilot trials can differ significantly from what develops during high-volume production.

The Polaron pilot plant eliminates this mismatch by replicating all key processing conditions of a full-scale Polaron line:

• Working pressures up to 120 bar
• Direct CO₂ or NH₃ cooling
• Tubular SSHE geometry identical to industrial units
• High-shear pin rotor cylinders with interchangeable volumes

By mirroring the physics of full-scale crystallisation, the pilot plant ensures that fat crystal networks, plasticity, and final product behaviour develop in the same way they would in commercial production.

Matching pressure, flow, and cooling dynamics

Achieving a truly scalable process requires more than just similar equipment; it requires identical process dynamics. The Polaron pilot plant maintains:

• Comparable flow patterns and residence times
• Equivalent scraping, kneading, and shear profiles
• Controlled temperature gradients along the cylinder
• Stable emulsion behaviour under realistic cooling curves

This alignment is what makes pilot results predictive rather than approximate. R&D teams gain reliable data that can be transferred directly into full-scale production parameters.

Engineering consistency in crystal formation across scales

Gerstenberg Services’ engineering approach focuses on reproducibility of crystal formation: the foundation of texture, stability, and performance in fat-based products. By maintaining uniformity in shear energy input, cooling intensity, and pressure at all scales, Polaron technology promotes consistent:

• β′ crystal formation
• Plasticity and spreadability
• Aeration behaviour
• Structural integrity over shelf life

This ensures not only a smooth scale-up but also a stable, high-quality final product that meets performance expectations across markets and applications.

With Polaron pilot technology, manufacturers can move from prototype to production with confidence, knowing that their trial results will translate seamlessly to full-scale performance.

Pilot plants are more than just testing facilities: they are strategic tools that give R&D teams a competitive edge. By allowing small-scale trials that replicate full-scale production conditions, pilot plants accelerate development timelines and reduce the cost and risk associated with innovation. Companies can test new formulations, alternative fats, or emulsifier systems without tying up large volumes of raw materials or disrupting ongoing production.

The flexibility of pilot-scale setups also enables teams to respond quickly to changing market demands or supply chain disruptions. For example, reformulating a product to replace a scarce ingredient can be trialled safely and efficiently, providing actionable results before full-scale implementation.

Using a pilot plant also strengthens collaboration with customers and stakeholders. Demonstrating a reliable, reproducible process helps build confidence in new products and supports joint development efforts. By combining speed, precision, and risk mitigation, pilot plants make it possible to bring higher-quality products to market faster, optimise resource use, and drive continuous innovation in fat-based products.

In short, pilot plants allow R&D teams to innovate boldly, move quickly, and make data-driven decisions – all while controlling costs and minimising operational risk.

At Gerstenberg Services, supporting R&D goes far beyond supplying pilot-scale equipment. Our team works closely with customers to guide process design, helping ensure that each trial is optimised for both efficiency and reproducibility. We provide hands-on training for customer teams, enabling operators and product developers to understand how process parameters – from temperature and pressure to shear and crystallisation dynamics – influence final product quality.

Throughout the development process, we support trials, assist with formulation adjustments, and offer practical insights to help translate pilot-scale results into full-scale production success. By leveraging decades of engineering heritage from the Polaron and Perfector lines, we combine proven technology with expert guidance, giving R&D teams the confidence to innovate faster and more reliably.

With Gerstenberg Services as a partner, pilot plants become not just a tool, but a bridge between creative product development and consistent, scalable manufacturing.