<ul> <li>Here are ways to solve it:</li> <li>1) Roll it up tightly with a cylinder for 3-4 days, it will be ok.</li> <li>2) Heat it with a steam iron on the back of item, then it will be smooth again.</li> <li>3) Stretch it and clamp it to a back drop stand for 3-4 days, it also works.</li> </ul>