Laser marking is the technique of using a laser beam to decolorize the material and produce a permanent mark on the surface of the workpiece.

Unlike other laser processes, laser marking does not involve material removal, and the mark is produced by altering the physical or chemical properties of the material.

In this process, a low-powered laser beam is moved over the surface of the material to initiate a chemical alteration that results in the darkening of the target material.

This produces a high-contrast permanent mark on the material's surface.

It is generally used for applications such as marking manufactured parts with serial numbers, QR codes, barcodes, logos, etc.

Laser engraving is a process that requires comparatively more laser power than laser marking.

In this process, the laser beam melts and vaporizes the material to produce a void or cavity in the desired shape.

Generally, during laser engraving, the material removal is accompanied by the darkening of the surface, thereby resulting in a visible engraving with a high-contrast mark.

Laser engraving is used wherever durable, high contrast, mechanically durable markings are required. Typical applications can include: durable signage, product marking, artistic engraving for commemorative items, and PCB (printed circuit board) marking.

Laser etching is the process of using a high-energy laser to melt the surface of the workpiece and produce a visible mark by creating micro-elevations and discoloring of the material.

These micro-elevations change the reflective properties of the material, thereby producing a visible mark in the desired shape.

Although it is similar to laser marking operation, it requires comparatively more laser power to remove the material and is generally performed where a long-lasting mark with minimal material removal is required.

From personalized gifts and decor to parts with barcodes, QR codes, and serial numbers for product traceability, there are many uses of laser etching.