Wallpaper

Wallpaper is material which is used to coat and decorate the interior walls of home, offices, and other buildings; it is one part of interior decoration. Wallpapers are usually sold in rolls and are place onto a wall using wallpaper glue.

Wallpapers can appear either plain so it can be decorated or with patterned graphics. Wallpaper printing techniques contain surface printing, gravure printing, silk screen-printing, and rotary printing. Mathematically speaking, there are seventeen basic patterns, described as wallpaper groups, which can be used to tile an countless plane. All artificial wallpaper patterns are based on these groups. A single model can be issued in several different color ways.