How Does Fiber Laser Marking Machine Affect Leather Marking and Prevent Yellowing at the Edges?

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How Does Fiber Laser Marking Machine Affect Leather Marking and Prevent Yellowing at the Edges?

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Introduction:

The Fiber Laser Marking Machine (FLMM) has become a popular choice for precision marking across various industries due to its versatility, efficiency, and durability. However, when it comes to marking leather, a material known for its sensitivity to heat and light, operators often face challenges such as discoloration or yellowing at the edges. This article will explore the reasons behind this phenomenon and offer solutions to prevent yellowing when using a FLMM on leather.

Understanding the FLMM:

A FLMM uses a fiber laser source to engrave or mark materials with high precision. The laser's ability to focus on a small spot allows for detailed and clean markings. The key to preventing yellowing on leather is understanding the interaction between the laser's energy and the leather's surface.

Causes of Yellowing:

1. High Power Settings: Leather is susceptible to thermal damage when exposed to high laser power. The heat can cause the leather's natural oils to react, leading to yellowing.
2. Long Exposure Time: Prolonged exposure to the laser can also cause discoloration, as the material is heated for an extended period.
3. Laser Wavelength: Certain wavelengths may interact differently with the leather's pigments and compounds, potentially causing color changes.

Preventive Measures:

1. Adjust Power Settings: Lower the laser power to minimize heat exposure. Start with the lowest setting and gradually increase until the desired marking depth is achieved.
2. Shorten Exposure Time: Decrease the time the laser interacts with the leather surface. This can be achieved by increasing the laser's scanning speed.
3. Optimize Wavelength: Choose a laser wavelength that is less likely to cause discoloration. For example, shorter wavelengths like those in the UV range may be more suitable for certain types of leather.
4. Use Protective Coatings: Applying a protective coating or primer on the leather before marking can act as a barrier, reducing the heat transfer to the material and preventing yellowing.
5. Laser Marking Parameters: Experiment with different marking parameters to find the optimal combination that provides a clear mark without causing discoloration. This may include pulse width, frequency, and hatch spacing.
6. Post-Marking Treatment: In some cases, a post-marking treatment such as a light cleaning with a leather-safe solution can help remove any residual oils or compounds that may cause yellowing.

Conclusion:

The Fiber Laser Marking Machine is a powerful tool for marking leather, but it requires careful operation to prevent unwanted side effects like yellowing at the edges. By understanding the causes and implementing the right preventive measures, operators can achieve high-quality, durable markings on leather without compromising the material's appearance. As with any material, it's essential to test and refine the process to achieve the best results for each specific application.

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This article provides an overview of the challenges and solutions related to using a Fiber Laser Marking Machine on leather to prevent yellowing at the edges. It is crucial for operators to understand the material's sensitivity and adjust the laser settings accordingly to achieve the best results.

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How Does Fiber Laser Marking Machine Affect Leather Marking and Prevent Yellowing at the Edges?