Laser engraving

Laser Engraving: Permanent Markings with Exceptional Precision

The laser engraving process is based on the interaction between the laser’s concentrated energy and the surface material. When the laser beam is focused on the surface, the material is heated rapidly, causing it to melt, vaporize or oxidize, leaving a permanent mark. Depending on the material and the type of laser used (such as fiber, CO2 or UV lasers), the mechanism may involve thermal, photochemical or photomechanical reactions. For example, fiber lasers are often used for metals because they generate a very intense beam that efficiently melts and engraves the surface, while CO2 lasers are better suited for organic materials such as plastics and ceramics. The laser system is highly controlled, with automated positioning and precision down to micrometers, ensuring consistent and repeatable results.

Different Types of Laser Engraving

There are several variations of laser engraving, distinguished by the type of laser source and the specific engraving method:

• Deep Laser Engraving: This technique removes more material to create a deeper mark, which is especially useful in high wear environments. This is often used for automotive and aerospace parts.
• Laser etching: A faster and less invasive method where only the surface layer is modified without removing much material, ideal for sensitive or heat-sensitive parts such as electronics or medical devices.
• Color Laser Marking: This variant uses specific lasers to change the chemical composition of the surface material, allowing color changes without physically engraving the surface. This is often used for branding and aesthetic enhancements.

Material compatibility

Laser engraving is compatible with a wide range of materials, including metals (such as stainless steel, aluminum and titanium), plastics, ceramics and certain composites. Each material responds differently to the laser. Metals often require fiber lasers for precise engraving, while plastics and organic materials respond better to CO2 lasers. Surface preparation, such as cleaning or coating, may be required prior to engraving to optimize the visibility and adhesion of the engraving. For reflective metals, adjustments in laser power or the use of a marking paste can help reduce problems such as beam deflection.

Performance Benefits

The key performance advantages of laser engraving are its superior durability and resistance to abrasion, chemicals and environmental influences. Unlike other marking techniques, such as inkjet printing or labeling, laser inscriptions do not fade, flake or corrode over time. This makes them ideal for critical applications where long-term traceability and reliability are required. In addition, laser engraving is a non-contact process, minimizing the risk of damage to the base material. Quantitatively, laser inscriptions retain their clarity and legibility even after exposure to harsh conditions such as abrasion, chemical baths and high temperatures.

Applications and Industrial Relevance

Laser engraving plays a crucial role in various industries due to its precision and durability. In aviation, it is used to identify and track parts, meeting strict industry standards for safety and durability. Medical devices use laser engraving to apply permanent, sterile markings, such as serial numbers and calibration labels, without adding contaminants. In the industrial sector, machine parts and tools often feature engraved logos or identification markings to ensure brand recognition and operational clarity. In addition, electronics manufacturers use laser engraving to mark delicate parts with intricate detail without affecting electrical or thermal performance.

Customization and Process Optimization

One of the main advantages of laser engraving is the high level of customization. We can customize the engraving depth, width and resolution to meet the specific requirements of a project. For example, customers in the aerospace industry may require deep engravings for durability under extreme conditions, while medical device manufacturers may prefer very fine, shallow markings for identification without surface disruption. In addition, we offer a wide range of finishing options, including color fill for enhanced contrast, and can engrave complex geometries to close tolerances. Our advanced machinery allows quick changeovers between jobs, optimizing the process for short lead times and large-scale production.