Direct Part Marking Specifications for Serialized Batch Traceability Systems
Direct part marking demands precise laser parameter tuning matching substrate chemistry to pass ISO 29158 inspection without structural degradation.
Surface Reflectivity
Meaning
Physical properties of materials determine the proportion of light that is reflected from their surface during optical scanning or laser marking processes. The surface reflectivity affects how easily a barcode verifier or scanner can distinguish between the dark and light elements of a printed code. Managing this optical characteristic is essential to ensure that product identifiers can be read by automated logistics systems.
Verification Challenge
Scan failures often occur in distribution centers when high-volume logistics systems cannot read codes printed on highly reflective packaging. High surface reflectivity can cause glare and blind the scanner’s optical sensors, which reduces the apparent contrast of the barcode. This scanning error can lead to sorting delays, manual handling requirements, and subsequent chargebacks from the distributor.
Laser Processing
Markings created by laser engraving systems depend heavily on how the target material absorbs or reflects the laser’s energy. If the material has high surface reflectivity, much of the laser’s power is reflected away, requiring higher energy settings or different wavelengths to achieve a permanent, high-contrast mark. This adjustments must be carefully calibrated to prevent damage to the underlying product structure, ensure high-contrast markings, and maintain production throughput.
Quality Standard
Specifications in supply contracts often define the acceptable range of optical properties for all packaging materials. Manufacturers must test the surface reflectivity of their cartons to ensure they comply with retail standards. This testing ensures that all distributed products are compatible with the automated scanning networks.