Road reflective glass beads for tunnel marking are high-performance microspheres designed for low-light tunnel environment, applied for tunnel wall marking, lane dividing line and tunnel entrance warning marking. This article introduces product features and procurement advice for overseas tunnel engineering designers and construction contractors.
Tunnel dedicated road reflective glass beads have three core merits. High refractive index improves retroreflection under weak light. Precise forming technology guarantees high bead roundness. Good wear resistance keeps effect under long vehicle rolling. It should be noted that high refractive beads fit low-light tunnel scenes, not required for bright open roads.
Common procurement mistakes. Use standard beads for tunnel marking, night visibility is insufficient, choose high refractive tunnel grade beads. Judge refractive index by visual look, cannot get accurate optical data, request optical inspection report. Ignore packing in long sea transport, beads break and agglomerate, adopt thick waterproof sealed bags. Accept bulk cargo without pre-shipment sampling, refractive index may fluctuate, arrange lab test before shipment. Select manufacturers without custom processing, cannot adjust bead parameters for tunnel paint, confirm custom service scope.
Four application scenarios. Inner tunnel lane marking: high refractive road reflective glass beads. Tunnel entrance warning marking: medium-high refractive beads. Ordinary open highway marking: standard beads. Temporary tunnel construction warning line: economical beads. Langfang Aolan Glass Bead Co., Ltd can customize refractive index and particle size, equipped with internal lab and strict batch quality inspection.
Our products export to more than 40 countries and regions. Langfang factory supports convenient global container delivery. Services cover technical consultation, raw material supply, logistics and on-site construction guidance. Full series glass beads can be purchased at one time. ISO, CE certificates and third-party test reports can be supplied.
Specifications:
Size: 100μm ~850μm
Refractive index:1.70~1.93
Roundness ≥80%
Bulk density:1.2~1.6g/cm³
All data subject to inspection report and physical samples.
Post time: Oct-16-2026