CO2 Laser Marking Machine for Non-Metal Materials

The fundamental difference is wavelength. CO2 lasers operate at 10.6µm, which is highly absorbed by organic and non-metallic materials — plastics, glass, wood, leather, paper, ceramics, and rubber. Fiber lasers operate at 1.06µm, which is absorbed by metals such as stainless steel, aluminum, and titanium. If your application involves non-metal packaging, components, or labels, a CO2 laser is the correct choice. If you need to mark bare metal parts directly, a fiber laser is required. For mixed-material lines, Kales offers both technologies.

RF (radio-frequency) metal tubes and DC-excited glass tubes are two fundamentally different laser excitation technologies. RF tubes deliver a service life of 20,000 hours versus approximately 2,000 hours for glass tubes — a 10× difference. RF tubes also produce marking speeds up to 10,000 mm/s compared to 1,200 mm/s for glass, and achieve 0.01mm precision versus 0.05mm. Critically, RF tubes maintain consistent output power throughout their service life, while glass tubes experience progressive power decay. All Kales CO2 systems use RF metal tubes exclusively. We do not offer glass tube configurations for industrial applications.

Yes. The KL-CO2-30 and higher models support EtherNet/IP, Modbus TCP, and RS-232 communication, allowing direct integration with PLCs, ERP systems, and MES platforms without custom middleware. The flying-laser configuration synchronizes marking to your conveyor encoder signal, enabling on-the-fly marking at full line speed. Kales provides engineering support for line integration, including PLC ladder logic, trigger signal wiring, and software variable data configuration. Most inline integrations are commissioned within one to two days on site.

Yes. CO2 laser marking is non-contact and consumable-free, eliminating ink migration and solvent contamination risk — a critical requirement for GMP-compliant pharmaceutical environments. For pharmaceutical serialization, our systems support GS1 DataMatrix, securPharm, HIBCC, and ICCBBA code standards, and IQ/OQ documentation is available for GAMP 5 validation. For food and beverage packaging, our systems comply with FDA 21 CFR and EU regulation 1169/2011 requirements for date coding and traceability.

A CO2 laser marking system has a higher upfront capital cost than a CIJ inkjet printer, but significantly lower operating costs over a 3–5 year period. Laser systems require no ink, solvent, nozzle cleaning kits, or filter replacements. The RF tube is rated for 20,000 hours with minimal maintenance. For production lines marking 50,000+ products per day, the TCO payback period is typically 18–30 months. Lines with multiple inkjet units often see payback in under 18 months after consolidating to a single laser system. Request our TCO comparison worksheet for your specific line volume.

CO2 lasers at 10.6µm are not suitable for marking bare metals (stainless steel, aluminum, copper, brass, titanium) because the wavelength is largely reflected rather than absorbed. Highly transparent materials such as clear glass may require surface treatment or a frosting agent to achieve visible contrast. Some high-reflectivity polished metal surfaces and certain thermally sensitive materials may also require a different laser technology. Kales provides free material testing — submit a sample and we will confirm suitability and provide marked samples before any purchase decision.