When silicone is cured on paper, the heat from the dryer generally drives moisture out of the paper, which could result in a sheet with low moisture and the paper curling. Usually this curl is on the coated side, or in the case of two sides being coated, the last side that was wet (coated). In most cases, the curl is in the CD or cross web direction, so the sheet has a tendency to curl up like a tube from side to side. (MD or machine direction curl is tension related and a topic for another time.)
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