A paper defect caused during calendering of a paper web characterized by lines or fractures that tear easily under tension. Wrinkles present on a paper's surface will impress deeply into the surface of the sheet when subjected to the pressure of the calender's rollers and cut partway (or even completely) through the paper. (See also Calender Spot, Calender-Blackened Streaks/Spots, Blister Cut, Fiber Cut, and Hair Cut.)
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