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Results demonstrate that the traditional approach to dispersing pigments is no longer valid when dealing with these “difficult” materials and that settling is unavoidable and so must be characterised and manipulated through the ink chemistry.

Document Type: Research Article

Publication date: January 1, 2004

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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