siasphere – Hemisphere for permanently consistent sanding results
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/kv_5955-1.jpg)
The surface of structured abrasives has a microscopically small hemisphere consisting of many grit layers lying on top of each other. As a result of this unique surface structure, new sharp grit is released with each wear to deliver a permanently consistent result.
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/4776.jpg)
Conventional abrasives
- Individual grains
- Electrostatic / mechanical coating
- Grit wear with each use
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/4775.jpg)
Agglomerated abrasives
- Multiple individual grains connected with a bonding bridge
- Coating of multiple grit layers
- No structured shape
- Mutual self-sharpening
- Increased lifetime
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/4777.jpg)
Structured abrasives
- Many grains glued to form a hemisphere
- Defined spherical structure
- Defined contact point with the workpiece
- New grit with each wear
- Consistent surface quality over the entire lifetime of the product
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/4718.jpg)
Consistent surface quality
Unused
Before 1st use
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/4719.jpg)
Light wear
After 1st use
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/4720.jpg)
Medium wear
After many uses
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/4721.jpg)
Heavy wear
Before end of lifetime
![](https://sia-abrasives.ir/wp-content/uploads/2016/09/g_performance-comparison_siasphere_en_2.jpg)
Performance comparison
- yellow: siasphere (high contact pressure)
- red: siasphere (low contact pressure)
- green: Conventional abrasives (high contact pressure)
- blue: Conventional abrasives (low contact pressure)