A paper defect characterized by a cut in a paper web, usually running diagonally to the machine direction. It is caused by a blister-like accumulation of excess paper at the opening of a nip between rollers on the papermaking machine. As the web passes through the nip, the blister cuts the web. (See also Calender Cut, Calender Spot, Calender-Blackened Spots/Streaks, Fiber Cut, and Hair Cut.)
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