High-quality surface smoothness and functionality

Valmet coating stations for board and paper machines

Valmet's innovative coating solutions are suitable for all paper and board grades. High performance and functionality are common characteristics for the entire range of coating technology. Taking advantage of Valmet's expertise in choosing the correct kind of coating and drying concepts means that your coating machine will produce high-quality board and paper in a cost-effective and energy efficient way.

Combining different coating methods

The different coating application methods are suitable for different purposes. Sometimes you need more than one coating layer applied with more than one coating type of a coating head to achieve the optimal results. In the following image you can see the different kinds of benefits of two different coating methods: blade coating and curtain coating. Blade coating improves smoothness and curtain coating improves coating coverage - together they delvier immaculate coating quality!

Profile variation with different coating methods

Profile variation with different coating methods is quite big. It goes hand in hand with the previous example of combining different coating methods. Peak-to-peak coat weight variation has a great effect on the prinnting quality in the later stages of the process. Let our experts help you choose the best solution for you!

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Learn more about our OptiCoat solutions

OptiCoat Layer curtain coating

The OptiCoat Layer multilayer curtain coater applies extremely thin – or thick - and uniform layers simultaneously all within one, compact coating station. It is equally suitable for both board and paper machines, regardless of their speeds and widths. The multilayer concept offers several advantages over single-layer curtain coating and other conventional coating methods.

OptiCoat Jet blade coating

OptiCoat Jet coating provides very uniform and skipfree coating quality. It gives the best possible surface smoothness compared to any other coating method.

OptiCoat Roll metering roll coating

In OptiCoat Roll coating an excess amount of coating color is applied to the paper surface with the applicator roll. Final coat weight is then controlled by a metering blade or rod. The coating quality is very uniform and smooth.

OptiCoat Short Dwell coating

OptiCoat Short Dwell is a blade or rod coater with short dwell time application, especially well-suited for high-speed LWC coating. Short dwell time means that water penetration into base paper is minimized. This enables archieving low coat weights easily.

OptiSizer Film sizing

OptiSizer Film offers a functional and innovative design, based on know-how and long experience. Its simple and reliable design results in easy operation, installation and fast initial start-up.

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Achieving closed-loop industrial chain for coated white lined chipboard at Zhejiang Forest United Paper

Jun 18, 2026

Zhejiang Forest United Paper invested in a new PM 6 board machine to strengthen its production capacity. The delivery included several advanced Valmet technologies, such as the world’s first OptiDry Coat double-pass air dryer, enabling compactness and high drying efficiency. With PM 6, the company achieved a closed-loop industry chain with coated white lined chipboard.

Reliable coating quality with OptiCoat Layer curtain coating station at WEIG KM 3

Jun 16, 2025

Watch the video and discover how WEIG Group invested in new coating technology and replaced an old air knife coater. In December 2024, their board machine KM 3 started up with new OptiCoat Layer coating station in Mayen, Germany. As a result the quality of the board has enhanced by improving coating coverage and reducing streakiness of the coating.

Umka Board Mill rebuilds - 70% more capacity and enhanced quality

Apr 14, 2025

Watch the video to learn more about how Umka Board Mill transformed its operations with three major rebuild projects by Valmet. These rebuilds increased Umka’s production capacity by nearly 70% and significantly improved board quality, enabling them to meet market demands and attract new customers.

Pilot trials on finishing technology at Valmet Paper Technology Center in Järvenpää

Feb 25, 2025

Experience our Paper Technology Center in Järvenpää, Finland, where you can pilot and test latest finishing technologies. The pilot facility offers extensive pilot trials on finishing technology, covering all grades and different finishing technologies from sizing to reeling, winding, and runnability testing.

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Zhejiang Forest United Paper’s PM 6: Pioneering OptiDry Coat double-pass air drying technology

Mar 31, 2026

Zhejiang Forest United Paper built a new paper machine PM 6 in Taizhou, Zhejiang, China. Valmet supplied four headboxes, top forming unit, four coaters, and four air dryers. One of the air dryers was an OptiDry Coat double-pass, the first of its kind in the world.

A journey to enhance operational excellence

Jun 30, 2025

JK Paper Limited has embarked on a series of transformative projects to elevate efficiency, energy savings, and product quality. With multiple investments and continuous support, the company is now ready to maintain its competitive edge in an evolving market.

WEIG KM 3: Reliable coating quality with OptiCoat Layer curtain coating station

Jun 16, 2025

In December 2024, WEIG Group’s latest investment in its KM 3 board machine, an OptiCoat Layer coating station, started up in Mayen, Germany. The curtain coating technology replaced an old air knife coater and has enhanced the quality of the board by improving coating coverage and reducing streakiness of the coating.

Ensuring board quality with multiple coating stations in JK Paper Limited BM 5

May 5, 2025

JK Paper Limited invested in a new coated board making line BM 5 at their Songadh mill in India. The 4.25-meter-wide board machine, which started up in 2021, produces folding boxboard and solid bleached board. Despite the delays and challenges caused by the global pandemic, now, three years later, the results are good: the quality of the board has been excellent, and the efficiency of the mill has improved.

Umka Board Mill increases capacity by 70 percent with three rebuilds

Apr 14, 2025

Umka Board Mill invested in three large rebuild projects, selecting Valmet as the main supplier. The rebuilds increased their capacity by nearly 70 percent and significantly improved board quality. As a result, Umka now meets the market’s demanding expectations and is attracting new business and customers.

Successful start-up of Zhejiang Forest United Paper’s PM 6 production line

Mar 27, 2025

On March 8, 2025, Zhejiang Forest United Paper successfully started up its PM 6 board machine and produced its first roll of white lined chipboard. The start-up marks a solid step in Zhejiang Forest United Paper’s journey to achieving higher board quality and improved production efficiency. The board machine includes OptiDry Coat double-pass air dryer, which is a completely new one of its kind.

Safer and quicker top slitter exchange in Japan

Mar 17, 2025

A paper producer in Japan is enhancing their off-machine coater with Valmet Quick Change Slitter Holder. This upgrade aims to boost operational efficiency and safety standards. Key targets include improving cutting quality, reducing slitter changing time, extending blade lifetime, and increasing operational safety.

Liansheng Pulp and Paper: big success with PM 1 carton board and PM 3 high-grade fine paper lines

Feb 27, 2024

Living up to expectations, Liansheng’s PM 1 carton board and PM 3 high-grade fine paper production lines have been recognized as a success not only by Liansheng, but also by their customers.

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Learn more about the services and automation solutions for coating

Coater blades

Coater blades play an important role in the paper or board making process. They hugely affect efficiency, both materials and time, and have a major impact on final product quality. In blade coating, paper quality variations and rapid wearing of coater blades inevitably result in production losses and higher blade costs. The Valmet Coater Blade family consists of four carbide blades which leave a uniform layer of coating color on paper or board surface, thus creating an excellent finish for d...

Coater roll covers

For highest quality coated board or paper, with high smoothness and gloss, in blade coating, Valmet offers a full range of reliable rubber roll covers as well as a high performing polyurethane cover. These roll covers have good wear resistance and strength properties ensuring long grinding intervals and long lifetime.

Roll maintenance

Valmet’s modular maintenance service solutions consists of roll maintenance, roll reconditioning, and roll upgrade services. These solutions help board and papermakers achieve maximum performance with transparent and consistently high-quality maintenance services.

Rolls

With over 50 years of roll manufacturing experience, innovative R&D, and the process know-how of a paper-machine builder, Valmet offers highly reliable roll solutions that provide maximum performance and extend maintenance intervals.

Tail threading

A reliable tail threading process decreases tail threading times, minimizes waste and improves safety. This means an investment in your process is an investment that pays for itself. Whether you need improvements in paper or board machines, we have an advanced tail threading solution that clearly enhances your production efficiency. Our comprehensive range of tail threading services, from preventive maintenance to tail threading study secures optimal operation of your equipment and reduces threa...

Automation for Board and Paper

Valmet provides future-proof automation solutions for board and paper production. The industry-leading distributed control system (DCS), quality control system (QCS), analyzers and measurements continuously improve your process performance while achieving savings in fibers, chemicals, and energy.

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