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Influence of Pigment Particles on Gloss and Printability for Inkjet Paper Coatings

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Previously, we have shown that coatings formulated with fumed silica pigments are capable of producing glossy inkjet media, despite the presence of these coating cracks, caused by shrinkage of the coating layer. However, their high cost and the inability to run them at high solids (>30% solids) limits their commercial application. Raising the coating solids with the addition of conventional pigments reduces the amount of shrinkage that occurs during drying, and thereby reduces the coating cracks, improving the final gloss of the coating layer.

In this research, the solids of fumed silica coating systems were increased by adding co-pigments of different particle sizes. Fumed silica was used as the main pigment and precipitated calcium carbonate (PCC) and ultra fine ground calcium carbonate (UFGCC) were used as co-pigments. The ratio of fumed silica to co-pigments were 100:0, 90:10, 80:20, 70:30, 60:40, 50:50, 0:100. These blends of pigments were previously shown to produce high gloss and good printability. The coatings were applied using Meyer rods to obtain a coat weight of 10g/m2 on one side. The optical brightness, printability, ink density, and ink gloss were compared. Based on the findings, it is concluded that the co-pigment systems had optical properties and printing qualities as good as the mono pigment coatings.

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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