Laser Coloring Technology-ShangHai RunQia Electronics Technology Co.,Ltd.

Laser Coloring Technology

Laser coloring technology can render metal surfaces golden, blue, gray and a variety of other colors. This process is applicable to many types of metals, including platinum, titanium, tungsten, silver, gold and more.

Metals treated with ultrashort and high-intensity laser pulses undergo surface modifications to form monochromatic or polychromatic nanostructures. The laser treatment process also alters the inherent surface properties of the original metal. In addition, the newly formed nanostructures on the metal surface will neither fade nor peel off.

Creating nanostructures on metal surfaces that can absorb almost all light enables ordinary aluminum blocks to become one of the darkest materials ever developed. Such black metal possesses extremely high light absorption characteristics, making it ideal for a wide range of light-harvesting applications. Potential applications span from manufacturing high-performance solar collectors to advanced stealth technology.

Intense laser irradiation can induce the formation of nanostructures such as pits, bead-like protrusions and filamentous textures on metal surfaces. The way these structures interact with incident light depends on the patterning mode of laser-structured morphology. Since these structures are smaller than the wavelength of visible light, their light reflection behavior is highly dependent on the specific size and shape of the nanostructures. Adjusting laser intensity, pulse duration and pulse number enables the configuration of nanostructures to be controlled, thereby regulating the reflective color of the metal surface.

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