Why does CE uv laser marking on plastic change color?

Due to the extremely small focusing spot and the small processing heat affected zone, the UV laser marking machine can perform ultra-fine marking and special material marking. It is the first choice for customers who have higher requirements for marking effect.

Careful friends will find that when the UV laser marking machine marks on plastic materials, it will show a black with clear marking effect. If you don't look carefully, you may think it is the masterpiece of the ink jet printer. The working principle of the machine is to use a higher-energy laser beam to destroy the surface of the object to achieve the marking effect. If it is metal, the color changes, we can understand that the background color of the material is printed, but there is an essential difference between plastic and metal. , What is the reason for the discoloration of plastic material marking? This is also the key point that Ollance wants to share with you today.

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La máquina de marcado láser UV marca sobre materiales plásticos, y el principio es que cambia el color debajo de la superficie del material, como la carbonización. Cuando se utiliza una máquina de marcado por láser UV, el efecto de marcado de ennegrecimiento se logra carbonizando selectivamente la capa inferior de la superficie plástica mediante la máquina de marcado por láser UV. La entrada de energía térmica se limita a una pequeña área designada, de modo que el contenido de marcado y el material de fondo se distinguen claramente, lo que es fácil de identificar y nos brinda una experiencia visual muy clara y hermosa.