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Reliable Jetting of Difficult Materials

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Pigmented ink jet inks have become increasingly popular as the stability, reliability and performance of these materials has improved to an extent that they are enjoying widespread used in most desktop printers. The traditional method of achieving this level of reliability is to ensure the pigment particle size is as small and as uniform as possible to help eliminate settling and clogging of the nozzles.

In contrast, this paper discusses methods of reliably jetting pigments with particle sizes and densities in opposition to the current trends of decreasing pigment particle size. In particular, we discuss the use of specific tailored dispersion chemistries in combination with bespoke ink supply systems in order to jet pigments with densities of up to 10 g/cm3 and mean particle sizes of 5 microns and beyond.

Results demonstrate that the traditional approach to dispersing pigments is no longer valid when dealing with these “difficult” materials and that settling is unavoidable and so must be characterised and manipulated through the ink chemistry.
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Document Type: Research Article

Publication date: 2004-01-01

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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