Things You'll Need
2 large, flat boards
Roll of parchment paper
Clamps or weights
No matter how beautiful the art on your poster, a fold mark or any type of wrinkle can ruin its appearance. While prevention is the best solution for keeping posters in good shape, sometimes creasing the delicate paper is unavoidable when a poster is moved or put into storage. Before you give up your wrinkled poster as a lost cause, the application of some heat and pressure may restore it.
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Cover a flat board with parchment paper. The board should be larger than your poster.
Unfold your poster carefully and lay it as flat as possible on top of the parchment paper. Cover the poster entirely with another layer of parchment, making sure the poster remains flat beneath the parchment.
Hold the parchment in place with one hand. Turn on a hair dryer set on low heat. Aim from directly above so that you don't blow away the paper, holding the dryer 12 to 18 inches from the parchment paper.
Move the hair drier back and forth, slowly, continuously, directing hot air at the problem spots until the parchment becomes very warm, but not too hot to touch.
Lay another large board on top to sandwich the poster in between the boards. Clamp the boards tightly in the corners, or add heavy weights on top of the boards. Set the assembly aside and leave your poster there for a week to remove the creases.
Remove the clamps or weights, then carefully remove the board. Pull off the parchment paper. Any fold lines, wrinkles or creases should be fixed and your poster will be flat. Discoloration or loss of color in a fold line needs to be repaired by a professional restorer.
Other ways to warm your poster before pressing it between the boards are: cover it with a dry towel right out of the clothes dryer for a few minutes; cover it with light cotton fabric and place it in the bathroom during a hot shower to steam it; lay a dry cloth over it and iron it on the lowest setting.
Never attempt to restore or repair valuable posters at home. They should be taken to an expert, or you risk the value of the poster significantly decreasing.
Mackenzie Wright has been freelancing since 2002 in the realms of writing, painting, photography, crafts and teaching the arts. Her writing has been featured in publications such as the "Saint Petersburg Times," "South Florida Parenting Magazine" and "Home Education Magazine." She holds a Bachelor of Arts in English and education.