Method and device for measuring the quality properties of paper and / or cardboard strips of material moving.

Procedure for measuring the quality properties of paper and / or cardboard strips in motion, where optical methods are used contactless where optical spectra are evaluated continuously, preferably in the infrared region (IR), measured with methods chemometric where a gradual evaluation procedure is applied, with which, firstly, the basic properties of the paper or paperboard are determined and, moreover, other properties are determined through a multi-stage modeling.