Method for determining the paper quality for halftone printing
AssigneeNordland Papier AG
InventorGerd Carl
Life of this patent
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Abstract
The invention relates to a method for determining the paper quality for halftone printing, according to which a finely distributed pattern of geometric figures is applied to the paper, said paper is then illuminated and the light that is reflected and scattered by the paper is observed. The method is characterised in that the pattern is applied to an optical transparent planar element, the side of said element bearing the pattern is brought into contact with the surface of the paper and the paper is pressed against the planar element.
Claims15
A method of determining the paper quality for autotypical halftone printing, in which a finely distributed pattern of geometric figures is applied to the paper, the paper is illuminated and the light reflected and scattered by the paper is observed, characterized in that the pattern is applied to an optically transparent surface element, this is brought flat into contact with the paper on the side on which the pattern is located, and the paper is pressed against the surface element.
Dependencies are inferred from the claim text.