JSEMAT  Vol.3 No.3 , July 2013
New Silica Coating Pigment for Inkjet Papers from Mining Industry Sidestreams
ABSTRACT

Silica is commonly used as an ingredient in the coatings of inkjet papers because of its capability to provide a coating layer structure combining a high pore volume, into which all the applied inkjet ink can transfer, and a suitable pore size distribution for very quick ink absorption. Nowadays, the production of silica pigment is quite expensive, and therefore, it would be advantageous to find a cheaper raw material source. In this study, the raw material was Greek olivine from magnesite mine sidestreams. The silica pigment was produced at laboratory scale by using nitric acid as a solvent. The target of this work was to clarify how this produced silica pigment is suited for inkjet coating pigments. The coating colors were applied by a laboratory rod coater on fine base paper and white-top kraftliner, and the coated surfaces were printed with a home and office area inkjet printer. The results showed that the produced olivine-based silica pigment has a potential in matt inkjet coatings. The coating of the produced silica pigment increased the print density, decreased the print-through, and diminished the bleeding of fine paper and white-top kraftliner board. However, further development work is needed to improve the pigment brightness to a more acceptable level, and to control the particle size at the nitric acid dissolution.


Cite this paper
T. Lamminmäki, E. Kenttä, H. Rautkoski, J. Bachér, S. Teir, J. Kettle and J. Sarlin, "New Silica Coating Pigment for Inkjet Papers from Mining Industry Sidestreams," Journal of Surface Engineered Materials and Advanced Technology, Vol. 3 No. 3, 2013, pp. 224-234. doi: 10.4236/jsemat.2013.33030.
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