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Tailor-Made Silica and Alumina for Inkjet Media Coatings

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The optical properties and printability of modern, microporous inkjet media is strongly controlled by the type of the pigments used inside the coating. It is well known that coatings based only on commodity pigments like clay or calcium carbonate cannot meet today's requirements. The use of amorphous, synthetic silica or alumina is not only setting the limits of conventional coatings, but is also making functional high performance pigments the key to meeting current and future requirements. These modern materials provide special pore structures and surfaces for the adsorption of dyes and/or color pigments resulting in properties like excellent image density, outstanding resolution and instant drying.

This paper gives an overview over the physicalchemical properties of special synthetic pigments and their relation to the parameters of the coating process and the resulting optical properties of the media. Such aspects as the pigment composition (silica, alumina, mixed oxides), the pigment formation process (fumed, precipitated), the particle size and structure, the dispersion process and the formation of the coating formulation are correlated with media properties like gloss, ink adsorption, and image quality.

Document Type: Research Article

Publication date: 2004-01-01

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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