Omya International Ag

Gilbert Botty

Philipp Hunziker

Roger Bollström

A method for detecting amorphous and/or crystalline structures of phosphate and/or sulphate salts on or within a substrate involves providing an LWIR imaging system with an infrared light emitting source (A) configured to emit infrared light over the range of 8 to 14 micrometers, an LWIR detecting device (B) configured to detect the intensity of electromagnetic radiation scattered, emitted, and/or reflected by the substrate, and control circuitry for the LWIR detecting device. The method further comprises providing the substrate, irradiating it with the infrared light emitting source, acquiring a stream of temporally consecutive images using the LWIR detecting device, and selecting, based on processing the acquired stream of images with the control circuitry, at least one focused image where the amorphous and/or crystalline structures of phosphate and/or sulphate salts are substantially in focus of the LWIR detecting device.

Method and apparatus for detecting an amorphous and/or crystalline structure of phosphate and/or sulphate salts on the surface of a substrate or within a substrate

The present invention relates to method of manufacturing a tamper-proof medium for thermal printing, wherein a liquid treatment composition comprising at least one acid is deposited on a substrate which comprises a thermochromic coating layer comprising at least one halochromic leuco dye.

Growing community of inventors

Maastricht, Netherlands

Gilbert Botty