How Does Color Laser Marking on Metals Work?
Use of a Laser Beam
The laser marking equipment emits a concentrated laser beam that can machine microscopic points on the metal surface. The heat and energy of the laser induce various chemical and physical reactions on the surface.
Creating Colors Using Different Methods
Oxidation: When certain metals, such as stainless steel, are treated with a laser, an oxide layer forms, which can result in different color shades. Different colors can be achieved by varying the thickness of the oxide layer and adjusting the laser parameters (e.g., intensity, speed, frequency).
Heat Treatment: The temperature changes produced by the laser can create various color shades on the metal surface. These color changes are caused by alterations in the crystal structure and surface of the metal due to heat.
Material Coatings: Special coatings are applied to some metals, which, after being treated with a laser, display different colors. These coatings can be oxide layers, paints, or other special materials.
Software Control: Laser marking is controlled by software, enabling precise and detailed realization of any pattern, text, or graphic. The software allows users to adjust the laser parameters to achieve the desired colors and patterns.
Applicable Metals
Stainless Steel: One of the most commonly used metals for color laser marking, capable of producing different colors through oxidation.
Titanium: Responds well to laser heat treatment, offering various shades.
Aluminum: Can be color-marked using special coatings and oxidation processes.
Copper and Brass: These metals can also be suitable for color marking, particularly when special coatings are applied