Here in this article, I am trying to define Raster Engraving vs Vector Engraving.
You can use both raster and vector files for laser marking and engraving. However, depending on the intended use, you may have to choose between them for your design.
Raster files (JPG, PNG, etc.) are the common format for large engravings, such as images, stamps, or angled letters. If you want to record any image taken with a camera, the option that interests you is raster engraving. Like on a computer screen, the image is formed by gradually adding dots to form any shape you can imagine. This method is also sometimes called “area etching.” It is a particularly suitable method for materials such as acrylic, as it provides a frosted finish with a marked contrast. However, it is not recommended for large engravings on glass, stone or ceramic surfaces, as the finish can be visibly uneven.
Vector files (SVG, EPS, etc.) are made up of lines that are drawn on the surface in sequence. If your design consists of minute lines and curves, vector engraving is the method for you. Professionals also refer to this approach as ‘scoring’, or even ‘online recording’. Vector engraving is effective on wood, as the burnt edge creates a striking contrast to the warm surface of the material. It is less suitable, however, for materials such as acrylic, as the cast edge is not very visible. The video above shows the advantages and disadvantages of both methods.
To achieve maximum effect, it may be interesting to combine both. The final pieces will show the machined surface of the raster engraving and the sharp profile created by the vector engraving. This result is especially effective on wood.
The difference between the two methods can lead to substantial cost savings even when ordering a single part from an online service. But how to decide between one and the other? As a basic rule of thumb, if your surface details consist of large and relatively simple shapes, you can opt for vector engraving, as it is the fastest, and therefore most economical, laser engraving method. However, if your design covers a wide area that contains a lot of intricate detail, you should go for the raster engraving method. In any case, you will ultimately have to decide taking into account which method works best for your design.
