Quality parameters of printing inks are highly dependent on the composition for each product and vary by manufacturer. The type, source and particle size of pigment is affecting the hue, colour saturation and lightness of the printing ink. Further, additives such as buffers, defoamers, wetting agents or thickeners can be added to obtain an ink formulation with the desired properties. The final product should be a stable colloidal solution, which maintains high applicability and colour strength over a certain period of time.
This application report explains how dynamic and electrophoretic light scattering can be used to monitor and characterise the particle size and stability of ink formulations without foregoing printing performance.
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