The process of engraving involves decorating and designing a hard material through cutting or carving. Historically, engraving has an artistic value, and people used to decorate and design stones, pieces of wood, etc. to create beautiful images, sculptures, etc. In modern days, the custom laser engraving method has become very effective and popular. Due to technological development, people have learned to use the capacity of a laser to cut, engrave, etch, or mark several materials. The word ‘laser’ stands for ‘Light Amplification by Stimulated Emission of Radiation’which means a hugely concentrated light is developed to make a strong beam that can cut materials. Using this laser beam, manufacturers create different designs and decorations on the basis of the requirements of the customers. This article focuses on discussing what is laser engraving and how does it work.
Laser and Laser Engraving Process:
The three major factors for preparing a laser beam are concentration, energy, and direction. In order to prepare a powerful laser light, manufacturers utilize the wavelengths of different light beams and concentrate them again and again. When the light waves are concentrated, it adds more and more energy. Due to the concentration, laser light becomes very tight, and it can be directed to a particular point.
The laser engraving process is a way of making deep marks or engraving permanently through vaporizing materials into fumes. A laser beam helps to remove the surface layer of material. Vaporization of material demands a high level of heat and to produce that, a laser beam generates a huge amount of energy and hits the localized area of the material.
The Difference between Laser Engraving and Laser Etching:
Although laser engraving and laser etching both are laser marking processes, in order to choose the right process for decoration, you need to consider three factors such as- i) the resistance of the material, ii) the laser marking speed, and iii) the compatibility of the material.
Therefore, when you are engraving metal workpieces, laser engraving technology is suitable. This technology is perfect to engrave steel and aluminum due to its ability to engraving 2D codes. This process is also effective for keeping readability rates, once the post-process treatment is completed. On the other hand, laser etching is effective when you don’t need to engrave the maximum resistant identifiers. This process is a high-speed method and does not depend hugely on ablation. Laser etching technology can be used on several materials such as aluminum, steel, anodized aluminum, zinc, lead, and magnesium.
As the light is entombed in deep cracks, laser engraving results in darker permanent marks. There are two ways to create contrast through laser engraving technology. First, the faster engraving method helps to create the contrast between the black marks and the bare materials, and this method is useful when the color of the bare material is pale enough. Second, the longer engraving method helps to etch white and black marks and creates higher quality contrast. This method is actually the combination of laser engraving and laser etching.