The residue must be washed off post laser processing. It is important to note that not all metals are suitable for spray or paste marking. The sprays and pastes themselves are costly and time consuming to apply, while the process requires a lot of energy and thus the laser must be moved at an appropriately low speed. This process is beneficial to certain metals as the process allows you to create a high contrast.
When using a fiber laser for marking, such as an industrial galvo laser or a speedy flex machine, the material is marked directly. There are several different types of laser marking, including, engraving, annealing and coating ablation. A speedy flex machine is an excellent laser marking tool. Combining both a CO2 laser and a fiber laser in one machine, you can process a variety of different materials in a single job, including workpieces with mixed material composition. This is possible without manually changing the laser source. Within the patented JobControl laser software you can assign the desired laser source to each colour of the graphic.