Things You'll Need
Bath towel or sheet
If your poster has been professionally framed, take it back to the framing shop to be fixed rather than trying it yourself.
The heat from the iron can damage your poster. Avoid using this method on original photos or artwork or anything that cannot be replaced.
Posters are a relatively inexpensive way to decorate the walls of your home with dramatic artwork, a favorite sports team or musician or beloved movie or movie star; they are a way to personalize your living space without breaking the bank. However, posters are typically made from thin paper, which is delicate and easily damaged, and they may have been stored or shipped rolled or folded. Luckily, this damage is simple to repair; rather than discarding a crinkled poster you can simply smooth out the wrinkles and continue to enjoy the image.
Take the poster off the wall; remove it from its frame, if necessary.
Set the iron to its lowest setting and allow it to heat up.
Lay the poster out on a large, flat surface such as a table. Make sure the poster is face down, with the blank side facing up.
Cover the poster with the sheet or towel and lightly spray the material with water. Your fabric should be damp, not wet.
Run the iron over one small corner of the fabric. Do this until the fabric is dry and then stop. Check the poster underneath for any heat damage. This should not happen if you iron is set low enough.
Iron the entire sheet or towel and poster, letting the gentle warmth dry the fabric and flatten the poster. Check the poster and repeat the process if there are wrinkles left.
Reframe and rehang your poster.