The terms “laser etch” and “laser mark” are often used interchangeably, but there is a subtle difference in their meanings:
Laser Etching:
Laser etching is a process that involves removing material from the surface of a material using a laser beam. The laser’s energy causes the material to vaporize or ablate, leaving behind a shallow indentation or groove on the surface. The result is a permanent and precise mark with a tactile feel. Laser etching is commonly used for engraving codes, serial numbers, logos, or other information on a variety of materials, including metals, plastics, glass, wood, and ceramics. The etched marks have contrasting colors compared to the original material, making them highly visible.
Laser Marking:
Laser marking, on the other hand, is a broader term that includes both laser etching and laser engraving. While laser etching specifically involves shallow surface removal, laser marking encompasses any process that uses a laser to create marks on the surface of a material. This can include shallow surface removal (laser etching), as well as deeper engraving or discoloration of the material’s surface without material removal.
Laser marking can create a range of mark types, including color changes (for example, annealing or oxidation marking on metals), foaming on plastics, or producing surface textures. The marking process can alter the material’s surface properties without significantly affecting its structural integrity.
In summary, the main difference between laser etching and laser marking lies in the depth of material removal. Laser etching specifically refers to shallow surface removal, leaving a permanent indentation or groove. Laser marking, on the other hand, encompasses a broader range of surface modification processes, including shallow and deep engraving, color changes, and surface texturing. Both methods are widely used for creating permanent marks on various materials, with applications ranging from industrial part identification to decorative engraving.