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Overview Inkjet Formulations and Limitations in the Graphic Arts Industry

SpecialChem / Apr 5, 2004

Before we start looking at UV inkjet applications it is interesting to spend a short moment overviewing the other technology used beside UV inkjet inks as well as some of the limitations they have. Water-based inkjet inks Aqueous inks are commonly used in home and small-office inkjet printers such as Hewlett Packard DeskJet series or Canon and Epson. Water based inkjet ink droplets have a specific behavior correlating to the intrinsic properties asked for them, i.e. low viscosity, long open-time, and low resin content. One starting point formulation can be found below. The water based ink actually depends on penetration and adsorption for its drying mechanism. Different methods are possible to be used to avoid color fading and dot gain. The first one would be to formulate the inks with coalescing agents. These coalescing agents diminish the minimum film forming temperature, and allows the emulsion used as binder to form a dry coalesced film faster on the substrate. Secondly, to control the penetration and the dot gain, some work can be done with the substrate itself.

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