- Dec 3, 2010
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I have a poster that has been rolled up for maybe a year. The poster is pretty heavy paper. It's been sitting flat under heavy books for a couple of weeks but it still curls when I lay it flat. Any ideas how to get it to flatten out? I think it's been rolled up for so long that lying it flat under weights will not work. I don't think it's possible to roll the poster up in the opposite direction without damaging it.