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Dielectric Constant of Ink Layer on HP-Indigo Developer Roller

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The binary ink developer (BID) in the HP-Indigo press converts low viscosity ElectroInk┬« into a paste that is presented to the photoreceptor to form the image. The developed mass density depends on the voltage applied as well as the dielectric thickness of the photoreceptor and the paste. For a given ink thickness, less is deposited if its dielectric constant e is lower. In this work we describe a technique to determine the ink impedance over a wide frequency range. From this it is possible to extract e at concentrations near that of the paste in the development nip. For an Indigo-compatible magenta ink, we find that ε ≈ 2, quite close to that of the carrier fluid. The impedance spectra of the ink layer also show features not present in the dilute state, shedding more light on the ink constituents.
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Document Type: Research Article

Publication date: 2010-01-01

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  • 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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