Polycarbonate Laser Marking Services & Additives
Additives, process development and production support for clear and tinted polycarbonate
Why Polycarbonate?
Achieving High-Contrast Marks
For laser types, process parameters and the causes of crazing, read the technical guide, Laser Marking Polycarbonate: Techniques and Parameters. This page covers the service side: additive formulations for clear and tinted PC, laser specification and production qualification.
For laser types, process parameters and the causes of crazing, read the technical guide, Laser Marking Polycarbonate: Techniques and Parameters. This page covers the service side: additive formulations for clear and tinted PC, laser specification and production qualification.
One of the most sought-after outcomes in polycarbonate laser marking is creating marks with exceptional contrast that remain clearly visible under varying lighting conditions and viewing angles.
CO₂ laser systems excel at creating high-contrast marks on polycarbonate through controlled surface modification. The laser energy causes localized melting and foaming of the material surface, creating a white or light-colored mark that provides excellent light-scattering properties. For the polymer itself see polycarbonate, and for the process across resins see plastics laser marking.
Clarity Preservation Features
Optical Clarity
Maintaining transparency while creating visible marks is crucial in automotive, aerospace, and electronics where optical properties cannot be compromised.
Surface Marking
Creates frosted or white appearance through microscopic surface texturing that scatters light while leaving bulk material optically clear.
Internal Engraving
Subsurface marking creates marks within the material volume without disrupting either surface, perfect for protective applications.
Precision Control
Advanced laser parameters enable marks that remain highly visible while limiting thermal effects to only marked regions.
Durability
Marks withstand UV radiation, temperature cycling, chemical contact, and mechanical wear while maintaining contrast.
Versatility
Works with clear, colored, UV-stabilized, and flame-retardant polycarbonate grades for diverse applications.
Industry-Specific Applications
Automotive Lighting
Headlights, tail lights, and instrument panels
Polycarbonate has largely replaced glass in automotive headlight lenses and tail light assemblies. Laser marking enables precise placement of required regulatory information without affecting light transmission or creating visual artifacts.
Medical Equipment
Device housings and laboratory instruments
The medical industry extensively uses polycarbonate for device housings, fluid containers, and diagnostic equipment. Laser marking withstands repeated sterilization cycles including autoclaving and chemical disinfection.
Safety Equipment
Protective gear and barriers
Safety glasses, face shields, protective barriers, and riot shields utilize polycarbonate for impact resistance. Laser marking applies certification marks without compromising protective properties.
Consumer Electronics
Smartphones, tablets, and accessories
Smartphone cases, tablet covers, and display windows incorporate laser-marked polycarbonate for brand identification and regulatory markings. Technology enables crisp logo reproduction and detailed graphics.
Material Grade Considerations
UV-Stabilized PC
Outdoor applications benefit from UV-stabilized grades that prevent yellowing. May require parameter adjustment for optimal contrast.
Flame-Retardant PC
Contains brominated or phosphorus-based compounds. Produces distinct mark colors and may require specialized parameters.
Clear Polycarbonate
Produces white or frosted marks with excellent contrast. Ideal for applications requiring transparency and mark visibility.
Colored Grades
Light-colored polycarbonates achieve good contrast with appropriate laser parameters. Dark colors may need higher energy.
Frequently Asked Questions
How do you get a high-contrast mark on polycarbonate without losing clarity?
Surface marking creates a frosted or white appearance through microscopic surface texturing that scatters light, while the bulk material stays optically clear. CO2 systems achieve this by localised melting and foaming of the surface, producing a white or light-colored mark with strong light-scattering. Advanced parameter control keeps the thermal effect inside the marked region.
Can polycarbonate be marked below the surface?
Yes. Internal or subsurface engraving places the mark within the material volume without disrupting either surface, which makes it useful where the outer surfaces must remain intact -- for protective applications and for security features that cannot be abraded away.
Does laser marking work on tinted, UV-stabilized and flame-retardant polycarbonate?
It does, across clear, colored, UV-stabilized and flame-retardant grades, but the additive and parameter set differ between them. Stabilizer and flame-retardant packages change how the surface responds, so the marking process is developed against the specific grade rather than against polycarbonate generically.
Why does polycarbonate craze or crack when marked?
Because polycarbonate is notch-sensitive and holds molded-in stress, and localised laser heating adds thermal stress on top of it. Crazing at the mark is generally a sign the energy input is too aggressive for the grade and its stress state. Parameter development, and where needed an additive that lets the mark form at lower energy, is the route out.
Where is laser-marked polycarbonate used?
Polycarbonate has largely replaced glass in automotive headlight lenses and tail light assemblies, where laser marking places required regulatory information without affecting light transmission or creating visual artifacts. It is also widely used in instrument panels and in medical equipment.
