WP-210
White Ceramic Microspheres
A premium low-iron alumino-silicate filler combining bright-white colour, 10 µm particle size and high mechanical durability for colour-critical formulations.
White performance without filler-induced greying
More than 90% sphericity, ultra-low iron and fine particle distribution support colour neutrality, efficient packing, improved rheology and a smooth coating finish.
True Colour Neutrality
Fe₂O₃ below 0.5% helps preserve bright whites, pastels and light shades.
TiO₂ Extension
Fine spheres act as spacers around TiO₂ particles to improve light-scattering efficiency.
Ultra-Low Oil Absorption
Oil absorption of 22–32 g/100 g supports higher filler loading and controlled binder demand.
Scrub, Burnish & Abrasion Resistance
Hard ceramic particles help coatings resist repeated cleaning, polishing marks and surface wear.
Thermal & Chemical Stability
Stable above 1000°C and resistant to most acids, alkalis and organic solvents.
Barrier & Durability
Fine spheres pack efficiently, reducing porosity and supporting long-term surface durability.
Designed for colour-critical applications
WP-210 is intended for formulations where whiteness, smoothness and durable mechanical performance are essential.
What is scrub and burnish resistance?
A coating must survive repeated cleaning without wearing away—and preserve its original sheen without developing polished, glossy patches.
Scrub Resistance
The ability of a dried coating film to withstand repeated wet cleaning with water, detergent, brushes or sponges without erosion, scratching, loss of hiding or exposure of the substrate.
Burnish Resistance
The ability of a coating—especially a matt or low-sheen finish—to resist an unwanted increase in gloss caused by rubbing, cleaning or polishing.
How WP-210 helps the coating film
Hard Ceramic Reinforcement
Mohs hardness of 5.5–6.5 helps the film resist cleaning abrasion, scratches and surface wear.
High Structural Strength
Individual spheres withstand at least 50,000 psi, helping them remain intact during processing and service.
Efficient Film Packing
A 10 µm D50 and more than 90% sphericity promote uniform packing, lower porosity and a smoother surface.
Controlled Binder Demand
Oil absorption of 22–32 g/100 g helps retain sufficient binder for film integrity and wet-scrub performance.
Practical result: WP-210 can support a harder, smoother and more uniformly packed coating film that better withstands repeated cleaning while retaining a consistent matt or low-sheen appearance. Final performance depends on resin quality, pigment-volume concentration, formulation balance and application conditions, so the optimum addition level should be established through laboratory trials.
Low iron makes the white-series difference
The supplied product page compares WP-210 with the standard grey GP-200 grade on iron oxide content and colour suitability.
Fe₂O₃ Content
Published maximum / typical comparison
WP-210: ultra-low iron and colour neutral. GP-200: standard grey grade for pigmented systems.
WP-210 Performance Markers
Published technical values
Particle Profile
- D50: 10 µm
- Sphericity: >90%
- Oil absorption: 22–32 g/100 g
- ISO brightness: >80
Durability Profile
- Crush strength: ≥50,000 psi
- Mohs hardness: 5.5–6.5
- Thermal stability: >1000°C
- Moisture: <0.5%
All values are typical or representative; use the current CoA for lot-specific results.
Designed for
practical processing
Introduce WP-210 under suitable agitation and optimise the loading according to viscosity, finish and mechanical requirements.
Pre-check compatibility
Confirm wetting and dispersion in the selected resin or binder system.
Add under controlled mixing
Use sufficient agitation for uniform incorporation without unnecessary dusting.
Optimise by trial
Evaluate viscosity, density, finish, adhesion and mechanical properties.
WP-210 can be used as a partial functional replacement for conventional fillers. The optimum replacement level should be established by laboratory trials.
| Parameter | Specification |
|---|---|
| Series | GEOSPHERES™ White |
| Particle Size D10 | 3–5 µm |
| Particle Size D50 | 10 µm typical |
| Particle Size D90 | 25–32 µm |
| True Density | 2.5–2.7 g/cc |
| Bulk Density — Loose | 0.65–0.85 g/cc |
| Crush Strength | ≥50,000 psi |
| Mohs Hardness | 5.5–6.5 |
| Sphericity | >90% |
| Thermal Stability | >1000°C |
| Oil Absorption | 22–32 g/100 g |
| pH — 10% Slurry | 6.5–8.5 |
| Moisture Content | <0.5% |
| Refractive Index | 1.50–1.55 |
| Surface Area — BET | 2–4 m²/g |
| Fe₂O₃ Content | <0.5% maximum |
| Whiteness — ISO Brightness | >80 |
| Packaging | 25 kg paper bags; 500 / 1000 kg bulk bags |
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