Herberts Gmbh

E.i. Dupont De Nemours and Company

Joachim Cramm

Paul Rupieper

Joachim Blum

Christian Voy&eacute;

Michael Hoffer

Method for the contactless measurement of optical parameters on a plane coating layer applied from a liquid coating compound or a liquid component of a coating compound having one or more optical measuring instruments, in which the coating layer is applied to the outer surface of a circulating carrier strip (closed upon itself) stretched over a drive roller and one or more tensioning rollers and the contactless optical measurement is then performed on the coating layer at a plane point on the carrier strip, wherein the carrier strip may be circulating during the measurement.

Method and device for the optical measurement of coating layers

Method for determining the visual effect of lacquer coatings on plastic surfaces, in which one or more successive lacquer layers is/are each applied onto the entire surface of a substrate consisting of a plastic test sheet joined with a metal test sheet and dried or cured, wherein the two test sheets are joined together in such a manner as to form a common plane, or planes arranged parallel to or optionally partially overlapping each other, one of the lacquer layers is applied in the form of a wedge with a layer thickness gradient, and, on the lacquer coated substrate surface obtained in this manner, one or more surface properties influencing the visual impression is/are then measured at least on the plastic test sheet by means of one or more optical measurement methods at measurement points distributed over the entire area in the form of a grid screen, and, solely on the metal test sheet, the particular thickness of the wedge-shaped lacquer layer is also measured.

Method for the characterization of lacquer coated plastic surfaces

Method and an apparatus for the characterisation of lacquered surfaces

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Wuppertal, Germany

Joachim Cramm