Abstract: A coated roll printing paper for printing with the cold-set offset-printing process is described, which gives a printing result comparable with that of low-weight coated matte grades. The paper is characterized by a high proportion of a fine calcium carbonate in the coating pigment, and a relatively low proportion of highly active binders.

Abstract: A lightweight, coated web printing paper is described which is suitable for use in the cold-set printing process, which has specific values for water penetration and ink absorption and has gloss values of at least 20% for a smoothness in the range of 200 to 600 sec. Bekk.

Abstract: A lightweight, coated web printing paper is described for suitability in the cold-set printing process, which has specific values for water penetration and ink absorption and has gloss values in the 40-50% range for a smoothness in the range of 500 sec. Bekk.

Abstract: The present invention relates to a thin printing paper with a weight per unit area in the range below 49 g/m.sup.2 and which contains wood and which is provided with surface pigmentation and which incorporates a mixture of a swellable coating silicate (sodium bentonite) and, for the remainder, conventional coating pigments as the pigment and which, in addition, contains only bonding agent that is a natural organic bonding agent, essentially starch. Even if only lightly calendered, the paper is equally well suited for rotogravure printing and for rotary offset printing. It is preferred that the paper also contain a proportion of processed fibres obtained from old-paper.

Abstract: A device for fiber fractionation to analyze for coarse particles or chips in which fractionation takes place by washing a sample of the fiber material on a horizontally disposed slotted plate submerged in water, a central bundle-type nozzle which extends from above into the water above the slotted plate, the jets of which are directed downwardly, preferably angularly, against the slotted plate, and means for collecting the material passing through the slotted plate.