Laser Marking Myths – Fact or Fiction?

There is no doubt that a rapidly growing number of consumer-packaged goods (CPG) and industrial manufacturers are recognizing the advantages of using laser marking technology. Laser systems are versatile, reliable, fast and capable of applying high quality and permanent information such as QR codes, DataMatrix codes and serial numbers, as well as text, figures, symbols and other vital details, onto a wide range of substrates while meeting regulatory, traceability and productivity requirements.

However, despite the benefits, there is still the perception that laser marking systems are expensive, unsafe and complicated. By separating fact from fiction, common misconceptions and myths about lasers can be debunked.

Laser marking is affordable

Laser marking systems are now available in multiple variants to suit a range of production and budget requirements. The substrate you need to mark primarily determines whether you need a CO2, fiber or UV laser machine.

CO2?Laser Marking

CO2?laser marking systems are ideal for moderate to high-speed, high-volume applications. CO2?technology delivers superior coding quality along with reliability across a wide range of substrates including paperboard, plastic, PET, glass and coated metals.

Fiber Laser Marking

Fiber laser machines are suitable for marking robust, high-density materials such as metals and plastics. These systems achieve better mark contrast at faster speeds making them ideal for industries with more demanding production schedules and increased throughput expectations.

UV Laser Marking

UV lasers induce photochemical changes to sensitive materials, making them the perfect choice for marking glass, certain plastics, and flexible packaging materials like films and foils. They operate with lower power requirements, minimizing thermal damage to the substrate, which is why they are frequently used on medical packaging and products, including glass vials, plastic bottles, and caps made from LDPE and HDPE.

It is also important to prioritize value over price alone. Unlike CIJ and TTO technologies, laser systems do not require consumables or have multiple different wear parts, eliminating the risk of clogging from ink or bunching up from ribbon. Inks can also be messy and results in stains on floors, conveyors, rollers, etc.

In addition, consumable levels have to be monitored continuously, and advance consideration given to stock requirements.

Laser marking is safe to use (with the right precautions)

Laser technology offers accuracy?and efficiency benefits. Yet, as with any high-powered equipment, understanding and implementing safety measures is paramount for accident prevention and peace of mind for those employees who operate the laser.

The type of hazard posed by a laser system is based on its wavelength and power. All Videojet lasers are considered Class IV and operated as Class I systems to ensure operator safety.

Precautions include installing beam shields around the point where the laser marks on the material. The design, dimensions, and material used to fabricate the beam shield are determined by the type of laser. Interlocks are normally included to stop operation if all the elements of the beam shield are not in proper position.

Why Does Beam Shielding Matter?

Beam shielding is an essential component of laser safety. It contains the laser’s path to prevent accidental exposure by ensuring that no one can get directly into the laser beam or be affected by scattered radiation. It also prevents damage to surrounding equipment.

Properly shielded lasers remove the risk of accidental exposure, which can result in eye damage or skin burns, and prevent the beam from redirecting back onto the machine. It also ensures zero risk of collateral damage to other equipment and infrastructure.

Tailored Shielding for Every Application

The laser equipment industry provides a range of beam shielding solutions, each designed to cater to different operational needs and laser types. Options include exit-only shielding, entire head shielding and full unit protection.

Fume Extraction

Because a laser’s interaction with the materials being marked often produces fumes and particulate matter that can compromise workplace air quality, fume extraction is a critical component of laser safety and in meeting operational and regulatory requirements.

Removing hazardous fumes and maintaining healthy air quality for employees is not only a matter of safety but also of worker comfort and productivity. Accumulation of fumes and particulates can also interfere with laser operation, affecting quality of the marking process. Fume extraction systems help ensure that the path of the laser remains clear and the production environment clean.?

Laser is easy to use

Laser marking itself is a simple process and most of today’s systems are easy to install and operate. The latest innovations in laser technology are game changers for reducing set up times. For example, with Videojet SmartFocus? technology, the laser automatically adjusts the focus distance to a distance predetermined during setup, accommodating different product sizes and substrates quickly and accurately. This time-saving feature helps ensure that production can proceed swiftly and seamlessly without compromising on quality.

Beam turning units are designed to simplify integration into production lines and maximise laser performance. By allowing 360-degree rotation, they are particularly ideal for environments where space is limited.

Conclusion

Low maintenance operation of lasers not only enhances efficiencies but also minimizes the likelihood of human error. Choosing the right laser system supplier is crucial in ensuring the success and safety of your operations. Laser marking is an exciting technology with distinct benefits for businesses across a wide range of markets. It is clean, cost effective and sustainable with reduced preventive maintenance and downtime.

Most importantly, as long as the correct safety measures are in place and proper training is provided to employees, lasers are safe to use.