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My TAPPI Story: Eupidio Scopel
The novel ultrasonic analyzer is presented as a tool to deal with print mottle problem. The new tester is designed to measure the uniformity of liquid absorption by paper at very short contact time between paper and testing printing liquids. Paper and paperboard up to 600 g/m2 can be tested with a resolution of 25 dpi. Such resolution is achieved due to the use of ultrasonic multi-sensor comprised of 32 horizontally arranged mini-sensor elements of surface area measured 1 mm2 each. New tester was used for uncoated paper like newsprint and SC papers as well as coated papers and paperboards. Test liquids such as water, acid oil or fountain solution were used to meet the specific objectives.
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Ultrasonic Systems for Liquid Absorption Measurements - Part.1. New Tester and Methodology for Mottl