Laser marking technology has enabled domestic companies to enter the laser processing industry. Especially after fiber lasers became widely used in laser equipment, the laser marking sector reached a market "peak." However, for many years, laser marking applications have been limited to black and white patterns. While this method was effective, it lacked visual appeal and creativity.
Recent advancements have introduced color laser marking on stainless steel surfaces, offering more visually striking results. This technique allows for vibrant, long-lasting color marks that go beyond traditional black and white. One of the key technologies enabling this is the MOPA (Master Oscillator Power Amplifier) pulsed fiber laser, which offers independent control over pulse width and frequency—unlike conventional Q-switched lasers.
By adjusting these parameters, the laser beam can alter the surface layer of stainless steel, creating various colors and decorative effects. This flexibility opens up countless possibilities for custom designs. However, the technology is still evolving, and many manufacturers find the cost prohibitive. A single color laser marking machine can cost as much as several standard models, limiting its adoption.
In Germany, a new laminate group has been developed for laser color marking. It consists of an outer transparent polymer layer with an infrared-absorbing dye that reacts under laser exposure, producing vivid colors. This material works on a wide range of substrates, offering advantages over traditional laser papers.
Similarly, in Japan, researchers have developed a composition containing a polymer, laser marking powder, and a temperature-sensitive substance. During laser exposure, heat triggers chemical reactions that permanently change the material’s color. The resulting mark is irreversible, ensuring long-term durability.
Shenzhen Jinyifang Laser Company is actively developing advanced color marking processes. As the technology matures, laser color marking is expected to become more complex and diverse. With its ability to create intricate, eye-catching designs, it is likely to expand the application scope of laser processing and become a major trend in the industry.
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