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Self-Stabilizing Carbon Blacks: The Technological Advantages of Aqueous Ink Jet Systems

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Abstract:

New chemical modification processes make it possible to introduce hydrophilic structures to the surface of pigment carbon blacks (pigment CBs). The modification can be done via cyclo additions or radical reactions, for example.

One potential application field for surface-modified pigment CBs is inkjet. The proportion of pigments inkjet inks will steadily grow. Especially self-stabilizing materials satisfy the high demands of this sophisticated technology.

This paper describes comparative analyses between conventional pigment CBs, their physical modification with the aid of polymers, and chemically modified pigment CBs with their wetting-agent free inks. Both pigment properties and ink properties were investigated. To clarify the differences of the pigments EDX-spectra coupled with electron-microscopy was an important method. Dispersion properties were characterized via the zeta-potential, the viscosity, the surface tension, and the particle size distribution of the CB in the dispersion. The results illustrate the benefits of the surface-modified pigment CBs developed by Degussa. In addition to the above-mentioned methods, the inks were tested in brand-name conventional SOHO printers. The dispersant free inks showed superior results with established bubble-jet print heads because the product properties of the surface modified pigment CBs were chemically fine tuned and the ink formulation was simplified.

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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