Fillers with high initial ink-absorbing speed and high glossiness have been required for photo quality ink jet papers. We have studied three types of silica with almost the same pore diameter of around 12nm.The coated layer made of sub-micron silica is found to be high homogeneous in structure in addition to high ink-absorbing capacity, suggesting that sub-micron silica is a excellent filler for high performance ink jet paper, compared with conventional silica.
Kenji Fukunaga, Kenichi Ishizu, Hiroya Yamashita, "Silica Filler for Ink Jet paper" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP17), 2001, pp 137 - 140, https://doi.org/10.2352/ISSN.2169-4451.2001.17.1.art00027_1