The choice of printhead and driving waveform can make the difference between dazzling success and dismal failure for any industrial inkjet system. Matthew Pullen, Meteor Inkjet’s product manager for dropwatching systems, discusses tools and techniques for manipulating printhead waveforms.
Dr Steve Ward-Smith of Malvern Instruments gives an overview of the main particle assessment techniques he will be describing in detail at the Inkjet Ink Characterisation course to be held at IMI Europe's Inkjet Summer School in Ghent, Belgium in June 2017.
Inkjet ink viscosity is a complex topic requiring specialist equipment and techniques to characterise fully. Viscosity is a key parameter mediating drop formation as well as substrate behaviour so is vital to understand in ink development. Mats Larsson from Malvern Instruments will describe the use of characterisation equipment to measure the rheological behaviour of inkjet inks at the IMI Europe Inkjet Ink Development Conference in Lausanne, Switzerland, 15-16 March 2017.
One of the most difficult aspects of developing reliable inkjet inks is creating a stable dispersion of particles within the ink. This applies to inks containing pigments for colour applications but equally to inks containing other particles for functional deposition applications, which are becoming increasingly important.
The fourth and final in a series of articles reviewing the sessions from the IMI Europe Inkjet Ink Development Conference.
Dr Maiju Pöysti of Biolin Scientific explains how surface tension measurements are performed, and how the specific conditions for inkjet printing lead to additional complications in surface contact angle measurement.
Tim Phillips looks at the fundamental issues facing ink developers, including the trade-off between application performance and printability, carrier choice, dispersion quality, characterisation and application-specific issues.
As inkjet technology progresses, the demand for characterisation of inks as regards their pigment size, the presence of single oversized grains and overall colloidal stability is increasing. Dr Thomas Benen of Microtrac introduces the main characterisation techniques used for inkjet ink dispersions.