Coated paper for offset printing

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 19/40 (2006.01) D21H 19/82 (2006.01) D21H 19/84 (2006.01) D21H 21/18 (2006.01) D21H 21/52 (2006.01) D21H 25/14 (2006.01)

Patent

CA 2614266

The specification pertains to a single or multiple coated printing sheet in particular but not exclusively for sheet-fed offset printing with an image receptive coating layer on a paper substrate. Unexpectedly short converting times and times until reprinting can be achieved by choosing a coating, in which the image receptive coating layer comprises a top layer and/or at least one second layer below said top layer, said top and/or second layer comprising a pigment part, wherein this pigment part is composed of 1-95 preferably of 80- 95 parts in dry weight of a fine particulate carbonate and/or of a fine particulate kaolin or clay and 1-100, preferably 6 to 25 parts in dry weight of a fine particulate silica, and a binder part, wherein this binder part is composed of 5-20 parts in dry weight of binder and less than 4 parts in dry weight of additives. Furthermore methods for making such a printing sheet and uses of such a printing sheet are disclosed.

L'invention concerne une feuille d'impression revêtue simple ou multiple destinée particulièrement, mais pas exclusivement, à une impression offset à feuilles, et comprenant une couche de revêtement réceptrice d'image sur un substrat de papier. Des temps de conversion et des temps jusqu'à réimpression étonnamment courts peuvent être obtenus par sélection d'un revêtement dont la couche de revêtement réceptrice d'image comprend une couche supérieure et/ou au moins une seconde couche sous-jacente à cette couche supérieure, lesdites couche supérieure et/ou seconde couche comprenant une partie pigment, cette partie pigment renfermant entre 1 et 95, de préférence entre 80 et 95, parties en poids sec d'un carbonate particulaire fin et/ou d'un kaolin particulaire fin, ainsi qu'une partie liant, cette partie liant renfermant entre 5 et 20 parties en poids sec d'un liant et moins de 4 parties en poids sec d'additifs. L'invention concerne également des procédés de fabrication de cette feuille d'impression ainsi que les utilisations de cette feuille d'impression.

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