China Road Marking Glass Beads Suppliers - High-Quality Reflective Beads from Trusted Factory for Safety Markings
The following chemical composition values are typical reference ranges for soda-lime road marking glass beads. Actual values may vary slightly according to raw materials, production batch, customer standard, and customized grade. WANCHENG MINERAL can provide batch inspection documents according to customer requirements.
Chemical Composition Reference
| Chemical Component | Typical Range | Function |
|---|---|---|
| SiO2 | 65-75% | Main glass network former |
| Na2O | 10-18% | Improves melting and glass formation |
| CaO | 5-12% | Improves hardness and stability |
| MgO | 0-5% | Improves durability |
| Al2O3 | 0-5% | Improves chemical stability |
| K2O | 0-3% | Auxiliary flux component |
| Fe2O3 | ≤0.5% | Controlled for appearance and transparency |
Frequently Asked Questions
What is the main chemical component of soda-lime road marking glass beads?
The primary component is Silicon Dioxide (SiO2), typically making up 65% to 75% of the composition. It acts as the fundamental glass network former, providing structural integrity and optical transparency.
Why is Fe2O3 content strictly restricted to ≤0.5%?
Iron Oxide (Fe2O3) is strictly controlled below 0.5% because higher concentrations cause discoloration and reduce bead clarity. Maintaining low Fe2O3 ensures high transparency and optimal retroreflectivity on roads.
How do CaO and MgO contribute to glass bead quality?
Calcium Oxide (CaO) and Magnesium Oxide (MgO) enhance the mechanical hardness, weather resistance, and long-term chemical durability of the beads under harsh road and traffic conditions.
Can the chemical formulation be customized for specific project standards?
Yes. While typical reference ranges apply to standard products, values can be customized to match specific national standards, customer project requirements, and specialized road marking grades.
Does WANCHENG MINERAL provide quality inspection documents?
Yes, WANCHENG MINERAL provides comprehensive batch inspection documents and Certificates of Analysis (COA) according to client standards and specific order requirements.
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