Home > Size determination of inkjet pigment dispersion with Nanoparticle Tracking Analysis from Particle & Surface Sciences

Size determination of inkjet pigment dispersion with Nanoparticle Tracking Analysis from Particle & Surface Sciences

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article image NanoSight Technology for particle size dispersion

Particle & Surface Sciences  distribute NanoSight Technology throughout Australia and New Zealand. Particle size and particle size distribution remain core measures in determining the functional and handling properties of pigment-based inkjet inks.

Colour density, opacity and viscosity depend directly upon the particle size. As jet nozzles get smaller and more numerous and the resolution demands of customers grow, the need to fully understand agglomeration and dispersion stability increases.

Existing techniques that address particle size in the sub500nm range have significant limitations with inkjet systems.

Dynamic Light Scattering (or Photon Correlation Spectroscopy) is inherently limited in assessing polydisperse suspensions. This is due to the measured signal being strongly intensity-weighted towards larger particles as the scattering from deeply sub-micron particles tends to proportionality to the sixth power of their diameter.

Electron microscopy, while providing a detailed insight into morphology, surface structure and much more, is inherently intrusive in preparation and provides limited statistically useful data.

NanoSight’s technology uniquely provides inkjet formulators with:

  • A unique view of dispersion quality where the individual pigment particles are visualised, moving under Brownian motion
  • A particle-by-particle, number size distribution of pigment particles provided by tracking the diffusion of individual particles, using video and specially developed software
  • An opportunity to study time-dependent effects, using real-time observation

Key features:

  • Compatible with most inkjet solvents
  • Proven on inorganic, organic and speciality pigments
  • Small sample volume
  • Full range of reporting functionality
  • All data exportable to spreadsheet
  • Rapid Results
  • Low cost to purchase and operate and most importantly, the particle size data is validated by a unique and informative dynamic view of the particles in suspension

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