Lime plaster used to coat walls, ceilings and earth floors *doma 土間. The word shikkui is said to be derived from the Tang Chinese word for lime. Shikkui is made by combining lime with glutinous matter like funori 布海苔 and red algae tsunomata 角叉, and fibers such as hemp thread; pounding, and then mixing in water. Sand and clay are also sometimes added. In wall construction, the plaster is applied to a mesh attached to and stretched between posts or pillars. Traditionally the coarsest type was the first layer to cover the mesh. Each layer was more and more refined, until the final coat had a very smooth surface. Many walls inside stone tomb chambers *kofun 古墳 are coated with shikkui; Takamatsuzuka 高松塚 (7th-8th century) in Nara is a particularly famous example.