New from QuadTech is a web-fed, in-line inspection system that measures colour on both paper and unsupported packaging film. The new, enhanced version of the company’s Inspection System with SpectralCam is said to enable continuous, in-line monitoring of virtually all web-fed packaging materials, including transparent and translucent substrates.
John Cusack, Product Manager at QuadTech, explains: “Film material, being unsupported, is less stable than paper as it is more susceptible to fluttering and wrinkling during production. The fluctuating distance between sensor and web makes it almost impossible to attain constant results.
“We have solved the problem by developing an innovative supporting device, positioned between the idlers. Its vacuum system stabilises the web on to a low friction surface, enabling the web to maintain a stable distance from the camera at the point of measurement. This also enables the camera to record spectral responses, required by ISO standards for calculating accurate L*a*b* values.”
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