Basically, inks are suspensions containing pigments as disperse and liquids as the continuous phase. One of the challenges is to stabilize these suspensions. The most important parameters regarding stability are the viscosity of the liquid and particle size distribution of pigments. Additionally, surface-active additives are used which could be characterized via zeta potential experiments.
| ANALYSYS METHOD | PARAMETER | MEASURING INSTRUMENT |
|---|---|---|
| Multiple light scattering | Long term stability | Contract analysis |
| Laser diffraction (wet or dry) | Particle size of powders | 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 |
| Electro acoustic | Zeta potential | DT-1202 DT-310 DT-300 |
| Acoustic spectrometry | Particle size in micrometer and nanometer ranges in concentrated dispersions | DT-1202 DT-100 |
| Gas adsorption | BET-surface area and pore analysis | 3P micro series 3P meso series 3P sync series 3P surface DX |
| Gas pycnometriy | Density | 3P densi series |
| Tap volumetry | Tap density | BeDensi T series |
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