How does a laser marking machine print a white material barcode on plastic?

First, we need to understand how the laser marking machine works. Laser marking machines leave marks on the surface of the material by irradiating a high-energy-density laser beam onto the surface of the material. In this process, the laser beam scans the surface of the material. By controlling the switching and movement of the laser beam, various patterns, text, codes, etc. can be formed on the surface of the material.

For leaving white codes on plastic, laser marking machines usually use appropriate laser power and irradiation time to cause chemical or physical changes on the plastic surface, thereby leaving white marks. These marks can be precisely controlled by controlling the shape, size, frequency and other parameters of the laser beam.

It should be noted that different plastic materials have different sensitivities to laser, so the appropriate laser power and irradiation time need to be selected according to the specific plastic material. In addition, in order to ensure the quality and clarity of marks, the focusing system and scanning system of the laser marking machine need to be precisely adjusted.

In short, the laser marking machine can accurately leave white codes on the plastic surface by controlling the switching and movement of the laser beam. This process requires the selection of appropriate laser power and irradiation time, and precise adjustments based on the specific properties of the plastic material.