Industrial laser marking is an advanced technology used in many sectors, such as automotive, aerospace, electronics and many others. Thanks to its fast, accurate performance, laser marking has become an essential process for product traceability and brand aesthetics. In this article, we’ll explore the different types of industrial laser marking, including decoloration, material removal, foaming and annealing marking, focusing on their characteristics, applications and importance to the industry.
Bleaching marking
Bleaching marking, also known as “color change marking”, involves the use of a laser beam to alter the color of the material’s surface, without damaging the material itself. This type of marking is commonly used on plastics, ceramics, painted coatings and some anodized metals. The laser beam causes chemical reactions on the surface of the material, resulting in a permanent color change. This marking process is ideal for applications where high resolution and optimum legibility are required, such as QR codes and serial numbers.
Material removal marking
Material removal marking, also known as “laser engraving”, involves using a concentrated laser beam to selectively remove thin layers of the target material. This type of marking is commonly used on metals like steel, plastics, ceramics and other hard materials. Laser engraving creates deep, permanent markings, ideal for applications where resistance to wear and corrosion is essential, such as industrial components and tools.
Foam marking
Foam marking, also known as “color marking”, is mainly used on plastics and certain rubber materials. When the laser beam strikes the surface of the material, it generates heat, triggering a chemical reaction that causes a foam to form on the surface. The foam creates a color contrast, enabling the creation of permanent, aesthetically appealing markings. Foam marking is commonly used in the cosmetics, packaging and medical products industries, where the visual quality of the marking is essential.
Annealing marking
Annealed marking is mainly used on metals. This marking process uses a laser beam to selectively heat the surface of the material, thus modifying its crystalline structure. The change in crystalline structure causes localized darkening of the material, creating a permanent, highly wear-resistant marking. Annealed marking is often used in the aerospace, tool and instrument manufacturing industries, where the durability of the marking is crucial.
Industrial laser marking offers a range of solutions to meet the varied needs of modern industries. The various types of laser marking, such as bleaching, material removal, foaming and annealing, enable precise, permanent product customization, as well as enhanced traceability and safety. Companies that adopt laser marking can not only improve their operational efficiency, but also strengthen their brand image by providing their customers with high-quality, clearly identified products.
