Less Risk of Air Bubbles One of the biggest frustrations when you paste the paper wallpaper is dealing with air bubbles trapped underneath. This happens because the wallpaper becomes soft and hard to manage when wet. With paste the wall wallpaper, the wallpaper remains firm and easier to position, which reduces the chance of bubbles forming. You can smooth each section against the wa... https://www.arthouse.com/blogs/how-to/a-step-by-step-guide-of-how-to-hang-paste-the-wall-wallpaper