Dispersions of Ink-Jet Pigments: Using NMR Relaxation Measurements as a Quality Control Too
The application performance of any pigment is determined by its nature, including how it was manufactured, and the level of dispersion achieved in formulation. The most important physical properties include particle size and wetted surface area. The finer the particle size, the more intense will be the color; the greater the surface area, the greater will be the extent and uniformity of surface coating. For industries that must produce products with reliably consistent colors, measuring particle size and wetted surface area quickly and easily will aid in more efficient formulation and help to reduce production costs.
So, what technique can make fast, reliable, direct measurements of wetted surface area in any suspension and, particularly, nanosize pigment dispersions? Nuclear magnetic resonance (NMR) relaxation, which is the basis for Mageleka’s MagnoMeter XRS™, can directly measure the wetted surface area of any particulate suspension.
