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There are a variety of causes for out-of-roundness that can impact bulky papers like newsprint and some book grades, as well as aluminium and plastic substrates. One cause can be periodic hardness variations in machine rolls which the webinar will explain how this effect can be tracked and corrected. Tapio specialise in measurement instruments, analysis software and consulting for the paper. Speakers Tapio Measurement Technologies: Tuomas Tiainen and Ilkka Mustonen. Moderator: Erik Ohls