In the cosmetic industry, high viscous dispersions play an important role. These systems are very difficult to characterize with standardized techniques. The shelf-life of cosmetics can be studied with multiple light scattering. Furthermore, particle size and shape play an important role in the application of the products and their classification.
| ANALYSIS METHOD | PARAMETER | MEASURING INSTRUMENT |
|---|---|---|
| Multiple light scattering | Stability of dispersions | Contract analysis |
| Laser diffraction (wet or dry) | Particle size of powder | Bettersizer S3 series Bettersizer 2600 Bettersizer ST |
| Image analysis | Particle shape | BeVision D2 Bettersizer S3 Plus |
| DLS – dynamic light scattering (Photon correlation) | Particle size in nanometer ranges | BeNano series |
| Acoustic spectrometry | Particle size in micrometer and nanometer ranges in concentrated dispersions | DT-1202 DT-100 |
| Electro acoustics | Zeta potential | DT-1202 DT-310 DT-300 |
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