Lutz Marathon Coating — and What You Need to Know About Blade Coatings

Blade coatings can improve wear resistance, reduce friction and extend blade life, but the right coating depends on the material, line speed and cutting problem. This article explains Lutz Marathon coating and how it compares with Sollex K and Z coatings for demanding film, foil and technical material slitting applications.

If you work with film slitting, foil converting, flexible packaging, technical textiles or industrial material cutting, you have probably heard about Lutz Marathon coating. It is one of several high-performance blade coatings used in demanding converting applications where blade life, cut quality and production stability matter.

But the important question is not only what a coating is called. The important question is whether the blade coating matches the material, machine speed, blade geometry and failure mode in your production line.

At Sollex, we work with industrial blades, machine knives, slitting blades and coated razor blades for demanding production environments. Our experience shows that the right coating can improve blade lifetime, reduce friction, minimize material build-up and support more stable industrial cutting. However, no coating is the best choice for every material or every converting process.

Learn more about other types of industrial coatings in the articles: Ceramic Coating for Industrial Razor Blades, Sollex Titanium Nitride (TiN) Coated Blades and Zero-Friction Coating for Industrial Razor Blades.

---

What Is Lutz Marathon Coating?

Lutz Marathon is a PVD-applied hard material coating used on industrial blades and cutting tools. PVD, or physical vapor deposition, is a coating process where a thin protective layer is applied to the blade surface to improve wear resistance, reduce friction and protect the cutting edge during operation.

Marathon coating is marketed as a micrometer-thin coating with a very low coefficient of friction, approximately 0.1 against steel. This is significantly lower than many traditional hard coatings such as TiN, which is often reported around 0.4–0.7 against steel depending on the test method and surface conditions.

In theory, a lower coefficient of friction can help the blade move more smoothly through the material, reduce cutting resistance and lower the risk of heat generation. However, friction against steel is not always the most relevant measurement in real industrial slitting and converting applications. On the production floor, performance depends on the actual web material, additives, line speed, blade pressure, cutting method and the type of defect the customer is trying to eliminate.

This is where practical cutting experience becomes more important than coating data alone.

---

Lutz Marathon Coating in Film and Foil Converting

Lutz Marathon coating is often discussed in relation to abrasive converting applications, including polypropylene raffia, PP films and materials containing calcium carbonate or other mineral additives. These materials can be aggressive on standard blade edges and may reduce blade life in high-volume production.

In applications involving PP film or abrasive synthetic materials, the coating may be of interest. However, Sollex normally evaluates whether a coated blade is the best solution or whether a different blade material is more suitable. For some PP applications, Sollex often recommends V blades made from solid hard metal, depending on the machine, material and cutting conditions.

The key point is that coating performance cannot be judged separately from blade geometry and base material. A coating can improve an already well-designed blade, but it cannot compensate for the wrong blade shape, incorrect blade material or unsuitable cutting setup.

---

Why Blade Coating Technology Matter

Every time a blade contacts a moving web, friction and wear create microscopic damage at the cutting edge. Over time, this damage accumulates and the blade gradually loses sharpness. This process happens faster in abrasive, filled, recycled, laminated or adhesive materials.

A good industrial blade coating acts as a thin, hard protective barrier between the blade edge and the material being cut. 

The best blade coatings help achieve three things at the same time:

• Reduce friction during cutting
• Protect the cutting edge from wear
• Extend the stable cutting window before blade replacement

In many converting lines, there is also a fourth requirement: the coating must help prevent adhesive, paper dust, film residue or mineral-filled material from sticking to the blade side or blade edge.

This is especially important in film slitting, foil slitting, flexible packaging, paper converting, adhesive material cutting and technical material converting, where even small changes in blade condition can affect slit quality, edge stability, downtime and total production cost.

---

No Single Blade Coating Works for Every Material

One of the most common mistakes in industrial blade selection is to treat coating as a universal upgrade. In reality, no single coating is superior for all materials, additives, substrates, speeds and cutting methods.

The right coating depends on several production factors:

• The material being cut
• The level of abrasiveness
• The amount and type of additives
• The risk of adhesive pick-up
• The machine speed
• The blade geometry
• The cutting pressure
• The required edge quality
• The main failure mode in production

For one customer, the problem may be fast edge wear. For another, it may be adhesive build-up. For a third, the issue may be dust, heat, poor edge quality or unstable slitting at high speed.

That is why Sollex evaluates blade coating as part of the complete cutting process, not as a standalone specification.

---

What Sollex K and Z Coatings Are Built For

At Sollex, we work with different coating directions for different industrial cutting challenges. Two important coating options are Sollex Ceramic (K) coating and Sollex Zero-Friction (Z) coating.

Both are developed for demanding slitting and converting applications, but they are not designed for the same problem.

---

Sollex Ceramic (K) Coating

Sollex Ceramic (K) coating is designed for applications where material build-up, sticking and abrasive behavior are key challenges. It is especially relevant for materials that tend to adhere to the blade surface or create unstable cutting over time.

Sollex K coating can be suitable for applications involving:

• Sticky materials 
•  Sensitive materials 
•  Paper and cardboard 
•  Materials containing calcium 
•  Materials with limestone or mineral fillers 
•  Abrasive converting materials 
•  Applications where blade cleaning causes downtime

The purpose of Sollex K coating is to reduce material transfer to the blade surface, support cleaner cutting intervals and improve production stability. In many applications, this can reduce the need for blade cleaning and help maintain consistent cut quality over longer runs.

Sollex Zero-Friction (Z) Coating

Sollex Zero-Friction (Z) coating is designed for applications where low friction, smooth cutting and stable edge quality are the main priorities.

Sollex Z coating can be suitable for applications involving:

• Thin stretched film at high speeds
• PCR film 
•  PIR film 
•  Printed film 
•  Sensitive flexible packaging materials 
•  High-speed film slitting 
•  Applications where friction, dust, heat or edge defects affect final product quality

In these applications, reducing friction can be more important than simply maximizing hardness. The goal is to support cleaner slitting, minimize build-up, reduce cutting resistance and help maintain final product quality in demanding converting environments.

---

Coating Is the Final Layer of Blade Optimization

A coating should not be seen as a shortcut. It is the final layer of performance optimization.

Before selecting a coating, the blade itself must be correct. This includes blade material, thickness, edge geometry, sharpness, bevel design and machine compatibility. Once the blade geometry is optimized for the substrate and cutting method, the coating can help improve performance even further. This is why Sollex does not recommend a coated blade based only on coating name or technical data. The complete cutting process must be evaluated. 

 For industrial blades, machine knives, slitting blades and coated razor blades, performance depends on the combination of:

• Blade steel or hard metal
•  Blade geometry 
•  Edge preparation 
•  Coating type 
•  Material behavior 
•  Machine setup 
•  Line speed 
•  Cutting pressure 
•  Maintenance routines

  
  

The best result comes from matching all of these factors to the customer’s production reality.

---

Lutz Marathon vs Sollex K and Z Coatings

Lutz Marathon coating represents a clear industry direction: lower friction, improved wear resistance and more advanced coating technology for demanding converting applications.

Sollex has made trials with Marathon coating and has seen that it can sometimes perform better than TiN in selected applications. However, more testing is required before Sollex can conclude whether Marathon is a true contender to Sollex K and Z coatings in the applications where Sollex already knows these coatings perform well.

From a practical standpoint, the comparison should not be reduced to one coating versus another. 

The more useful question is:

What is the main problem in the cutting process?

If the issue is edge wear on abrasive materials, the solution may be a wear-resistant coating or a different blade material. If the issue is adhesive pick-up or material build-up, the solution may be a coating designed to reduce transfer to the blade surface. If the issue is high-speed slitting of sensitive film, the solution may be a low-friction coating that supports cleaner cutting and better edge quality.

For this reason, Sollex evaluates coating choice based on the customer’s actual material, production speed, cutting method and failure mode.

---

The Practical Takeaway

High-performance blade coatings such as Lutz Marathon, Sollex Ceramic (K) and Sollex Zero-Friction (Z) all reflect the same broader development in industrial cutting: more specialized coatings, lower friction, longer blade life and better surface engineering.

But the best blade coating is not always the one with the lowest friction value or the strongest technical claim. The best coating is the one that solves the actual production problem.

If your line is experiencing edge wear, adhesive build-up, dust, heat, poor slit quality, frequent blade cleaning or short blade lifetime, the problem may be related to the blade, coating or machine setup.

Sollex helps customers identify the correct solution based on the complete cutting process. That includes material type, additives, line speed, blade geometry, current blade performance and the specific defect that needs to be eliminated.

Need Help Choosing the Right Blade Coating?

Choosing between Lutz Marathon coating, Sollex Ceramic (K), Sollex Zero-Friction (Z), TiN or another blade coating should be based on industrial reality, not only coating data.

If you want to know which coating is right for your application, share your material, cutting method, machine type and current blade. Sollex will help evaluate whether the best solution is a coated blade, a different blade geometry, a hard metal blade or another industrial cutting solution.

For demanding film, foil, paper, packaging and technical material converting, the right blade can reduce downtime, improve cut quality and support more stable production.

Contact us 

Read more about industrial coatings and their benefits in our blog post: "Guide to Knife & Blade Coatings".

---

FAQ - Questions concerning TiC Coated Blades