Wallpaper is a sort of interior decoration material that is used to embellish both private and public buildings’ interior walls. It’s usually sold in rolls and plastered to the wall. Plain wallpapers can be painted or used to help cover uneven surfaces and minor wall defects, resulting in a better surface, textured wallpapers (such as Anaglypta), wallpapers with a regular repeating pattern design, or, much less commonly today, wallpapers with a single non-repeating large design carried across a set of sheets. The smallest rectangle that can be tiled to produce the whole design is the pattern repetition. Wallpaper printing techniques include surface printing and gravure printing.