What is metal laser marking?
Laser marking for metals is an advanced technique used to engrave or permanently mark metal surfaces through the use of a laser beam. This method is valued for its accuracy, speed, and the lasting quality of the markings it produces. Used in a variety of industries, from automotive manufacturing to electronics, laser marking on metals ensures that marks, such as bar codes, serial numbers, logos, and other essential information, are clearly legible and resistant to harsh environmental conditions.
Advantages of laser marking on metal
Metal laser marking undoubtedly brings several advantages over other metal marking techniques:
- Durability: Metal laser markings are extremely resistant to wear, abrasion, chemicals and high temperatures.
- Accuracy: The laser beam of the metal laser marker can create intricate and precise details, enabling high-quality marking even on very small surfaces.
- Speed: Laser marking on metal is a rapid process that can increase production efficiency.
Versatility: Can be used on multiple metals, including laser marking on stainless steel, aluminum, brass, copper, titanium, and laser marking on iron.
Operation and types of laser engraving on metals
Laser marking for metals works by concentrating, using a metal laser marker, a high-intensity laser beam on a small area of the metal. The energy released by the marking laser heats the metal to cause a physical or chemical reaction on the surface, creating the marking. Specifically, there are two main processes for performing laser engraving on metal.
Black laser marking (oxidation)
Black laser marking, or oxidation, occurs when the metal laser marker heats the metal surface to the point of causing a reaction with oxygen in the air, forming a black oxide layer. This method is particularly useful for creating high contrasts on light-colored metals such as stainless steel.
White laser marking (material removal)
White laser marking, on the other hand, involves the removal of a small amount of material from the metal surface. This methodology produces a bright, clear mark that is ideal for applications where high contrast is needed, such as component tracking and decoration of metal products.
The role of marking paint in metal laser marking
Why use laser marking paint?
The use of laser engraving paints on metals can greatly improve the quality and visibility of markings on metals. These specific types of paints create a contrast layer that makes markings sharper and more legible, especially on metals that may not react well to lasers on their own. In addition, marking paints can protect the underlying metal from oxidation and corrosion, prolonging the life of the marking.
How to apply laser marking paint
It is by no means complex to apply metal laser marking paint but, at the same time, it is a process that should not be underestimated if optimal results are to be achieved. As a first step, the metal surface must be thoroughly cleaned and free of any traces of grease, dust or other contaminants. Second, the paint is applied evenly over the surface, using a spray or brush.
It is good to remember that it is always necessary to follow the manufacturer’s instructions to the letter regarding the drying time and thickness of the applied layer, so as not to run the risk of running into poor quality results.Once dry, the surface is ready for laser marking on metal.
Applications of laser marking for metals
Traceability and identification of components
Traceability of components is one of the main reasons for choosing to use metal laser marking, especially in settings such as automotive and aerospace, where accuracy and quality cannot be compromised. Bar codes, serial numbers, and other unique identifiers can be easily marked on metal components to ensure that each part can be tracked throughout its entire life cycle.
Marking logos and QR codes
Another application for which the use of metal laser markers is unrivaled is the creation of logos and QR codes on metal products. Logos can be intricate and detailed, and through this technique, high fidelity of the engraved brand can be ensured, whereas, QR codes can be scanned to provide additional information, enhancing customer interaction and product management.
Decoration of metal products
In addition to purely functional applications, laser writing on metals can be used for purely decorative purposes. For example, metal laser engraving of artistic designs, patterns, or text on metal surfaces is widely used in industries such as jewelry, architecture, and luxury goods manufacturing. Decorative marking not only adds aesthetic value to products, but also makes them unique and personalized at the same time.
Contact ATP for your marking paints!
If you are looking for high-quality marking paints to improve your laser marking operations, ATP Europe is the solution to all your problems. Particularly with our Metal Mark-3 paint, we offer the opportunity to purchase a product specifically for laser marking. Don’t wait any longer, contact us without obligation for more information and technical support.