Coated printing sheet and process for making same

Details Coated printing sheet and process for making same Coated printing sheet and process for making same

B - Operations, Transporting

41

M

B41M 5/00 (2006.01) B41M 5/52 (2006.01) D21H 19/38 (2006.01) D21H 19/76 (2006.01) D21H 19/82 (2006.01) D21H 19/40 (2006.01) D21H 21/52 (2006.01)

Patent

CA 2497751

A printing sheet is described comprising a substrate and, on at least one side of the substrate, an image receptive coating layer with a cumulative porosity volume of pore widths below 200nm as measured using nitrogen intrusion methods of more than 0.006 cm3 per gram paper. In particular in the context of printing sheets with high-gloss this particular porosity distribution leads to a quick and easily adjustable ink setting behaviour. Additionally a method for manufacturing such a printing sheet is described using organic, i.e. polymer and inorganic particulate pigments of fine particle characteristics.

L'invention concerne une feuille d'impression comprenant un substrat et, sur au moins un côté du substrat, une couche de revêtement de réception d'images à volume de vide cumulatif et à largeur de pore inférieure à 200 nm telle que mesurée à l'aide des procédés d'intrusion d'azote ou plus de 0,006 cm?3¿ par gramme de papier. Plus particulièrement, dans le contexte de feuilles d'impression à brillance élevée, cette répartition de porosité particulière amène à un comportement de réglage de la prise d'encre facilement et rapidement réglable. En outre, l'invention décrit un procédé de fabrication d'une feuille d'impression. Ce procédé utilisant des pigments particulaires organiques, notamment polymères et minéraux, présentant des caractéristiques de particules fines.

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