Engraving plastics has become more mainstream over the past few years, as manufacturers have created more laser-friendly materials.
Plastic
Engraving plastics has become more mainstream over the past few years, as manufacturers have created more laser-friendly materials.
Plastic manufacturers have developed a broad range of plastics with thinner cap sheets, which provide much better engraving and cutting characteristics. These plastics are commonly referred to as “micro-laminates,” “micro-surfaced,” or simply “laser engravable plastics.” They are generally very easy to work with since they all have similar characteristics. Although lasering plastic has become more convenient, it is still important to experiment with different plastic materials and power settings. Even if they are from the same manufacturer, different-coloured plastics will have unique speed and power settings.
Tips and techniques
- Always remove the clear protective cover layer before engraving.
- Most laserable plastics can be engraved at high speed with power adjusted accordingly for the wattage of your laser. When experimenting, set your speed to a fast setting, then adjust the power output until you get a nice engraving without any melting.
- With some plastics, it is best to engrave using two passes. The first pass cuts through the cap layer and the second pass cleans away any residue that may be left behind.
- Another useful technique is to mask the plastic before engraving, with transfer or masking tape. This will prevent a buildup of residue on the plastic surface.
- Try misting the transfer tape with water to reduce heat buildup and melting.
- If you do not get acceptable initial results with the recommended speed and power settings, start experimenting by first changing only the power setting. If adjusting the power setting does not work, start over and adjust only the speed setting. Once you have acceptable results, record those settings for that particular plastic, so you do not have to repeat the experimentation process.
Conclusion
Evidently, the question of what speed and power settings to use on different materials is not a simple one to answer, as there are many variables to consider. The recommended settings from your machine’s manufacturer should provide an optimal starting point for all your laser materials. However, experimentation with materials and settings is the best way to achieve the ideal look for each project.
Mike Dean is an owner and vice-president of sales and marketing for Epilog Laser. Known as “Mr. Epilog,” he is one of the founders of the company and has been an important part of its sales channel management, research and development, and product development. Dean is a highly regarded expert in the laser industry, as well as a regular presenter at trade shows and events.
