The protective coating is an invisible liquid laminated onto the print
surface to protect against creasing & de-coloring.
Most posters are printed without coating. As a result, even a slight
pinch could crease them. Over time, unprotected surfaces tend to
moisten, warp, de-color, or even stick to the wall.
Zno's Prime Posters get protective coating on both the front and back.
They are big, strong and wrinkle free.