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Plexiglass, also known as acrylic glass or PMMA, is one of the most popular materials for laser processing due to its transparency, durability and elegant finish. Many of our clients often ask: how can I achieve high-quality engraving on plexiglass using the Wattsan CO2 laser machine? In this article, we will tell you about the engraving process, from file preparation to post-processing, and compare the various methods that will help you achieve the best results.
Step one: preparing the file
The first step starts with preparing the file. Import or create your own design using RDWorks software, which is compatible with all Wattsan CO2 laser machines. Once your file is ready, set the engraving parameters depending on the thickness and type of plexiglass you are using. The main parameters that need to be set include:
- Engraving speed
- Laser power
- Line spacing
- Blowing settings (air assist)
These parameters will vary depending on what effect you want to achieve — matte finish, clear deep engraving or surface texture.
Comparing four methods of engraving plexiglass
To choose the best method for your needs, we have tested four common methods used in plexiglass engraving:
Engraving with full blowing (air assist)
When an engraving is applied with full air supply, the process is performed quickly and consistently, but at the same time, a white powdery coating often remains on the plexiglass surface. This plaque can be difficult to remove and require careful post-treatment. Although the result of the engraving is visible and clear, cleaning may not be ideal for time-consuming projects.
Engraving with minimal blowing
Reducing the airflow helps to minimize the amount of residue remaining on the material. A thin white plaque can still appear, but it can usually be easily removed with a soft brush or microfiber cloth. This method provides a good balance between the quality of the engraving and the ease of cleaning.
Engraving with a thin layer of WD-40
Some users apply a light layer of WD-40 to the plexiglass before applying the engraving. This method prevents the formation of white plaque, leaving a clean surface immediately after treatment. However, this leaves greasy spots that need to be carefully wiped off, which may require additional time and care. Despite its effectiveness, this method is not always ideal in large-scale production environments.
Engraving with a dried soap solution
Applying a dried layer of soap solution is another effective method. This approach results in minimal surface contamination, and any residue can be easily removed with a damp sponge. This method is especially practical for delicate or visually appealing prints and is recommended for obtaining a clean surface with minimal effort.
Choosing the right method
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Each method has its advantages and disadvantages. If you prioritize speed, then engraving with minimal blowout may be the most effective option. If you need a flawless surface immediately after engraving, the soap solution method may be the best choice. When experimenting creatively or working with small batches, WD-40 can give interesting results, but be prepared for additional cleaning.
Conclusion
Engraving plexiglass on a Wattsan CO2 laser machine is a simple process if it is properly prepared and configured. By carefully choosing the engraving technique — whether it’s blowing, chemical additives, or a simple soap solution — you can optimize both the visual quality of the results and the efficiency of the workflow.
No matter which method you choose, always conduct a test run on a plexiglass sample before embarking on full-scale production. This ensures that the method you choose will have the desired effect and minimize post-processing time. Thanks to the versatility of Wattsan laser machines, you have all the tools you need to master the art of plexiglass engraving.
