Wallpaper is material which is used to cover and decorate the interior walls of homes, offices, and other buildings; it is one aspect of interior decoration. Wallpapers are usually sold in rolls and are put onto a wall using wallpaper paste.
Wallpapers can come either plain so it can be painted or with patterned graphics. Wallpaper printing techniques include surface printing, gravure printing, silk screen-printing, and rotary printing. Mathematically speaking, there are seventeen basic patterns, described as wallpaper groups, that can be used to tile an infinite plane. All manufactured wallpaper patterns are based on these groups. A single pattern can be issued in several different colorways.
Like paint, wallpaper requires proper surface preparation before application. Additionally, wallpaper is not suitable for all areas. For example, bathroom wallpaper may deteriorate rapidly due to excessive steam. Proper preparation includes the repair of any defects in the drywall or plaster and the removal of loose material or old adhesives.
Most of the methods of wallpaper removal can be aided by mechanically perforating or scoring old wallpaper with a tool called a Paper Tiger, which looks like a puck with a wheel of sharp teeth. Rolling this tool on the wall in a clockwise or counterclockwise motion effectively creates tiny holes in the surface of wallpaper, but leaves the drywall undamaged.
The paper tiger is used for removal of non-peelable vinyl papers. Peelable vinyls are 2 layer papers, the top layer peeling off to leave a paper backing, which, being porous, is removed by just wetting it.
Perforation is followed by the application of either water, a chemical wallpaper stripper or steam to dissolve the underlying wallpaper paste.