Beyond road markings, solid glass beads are used as a functional filler – in thermoplastic and cold-paint marking materials, resins, artificial stone, plastics and decorative coatings. Buyers usually focus on price per kilo, but three technical points decide whether the filler works.
1. Roundness and sphericity
Perfectly round beads flow better, dose more evenly and scatter light uniformly. In coatings, irregular particles create streaks and thickness variation. Ask for roundness data and check a sample under a scope before committing to volume.
2. Size distribution
A tight band gives predictable dosing and stable viscosity. If the supplier only quotes “mesh” without a screen analysis, request one – filler performance lives in the distribution, not the label.
3. Chemical stability and transparency
In clear or light-coloured systems, tint and impurities matter. For premix into thermoplastic road paint, the bead must survive mixing temperatures and stay transparent for consistent retroreflectivity.
How premix beads behave in markings
When beads are blended into the marking material before application, the surface wears over time and exposes fresh beads – which is why premix systems keep reflecting longer than surface-only systems. Typical loading is 10-20% of the material weight, set by the spec.
Fluorescent and decorative options
Coloured or fluorescent beads add daylight visibility and decorative effects (contrast markings, sparkle finishes). Confirm colour stability and lightfastness for exterior use.
Linghang supplies premix and composite-grade glass beads in transparent and fluorescent versions, mesh 30-80, with tight sizing. View the composites range or send your binder system and loading target – we can recommend a starting grade and ship samples before you scale up.