Paper is very much employed in the traditional Japanese home, e.g. in sh?ji, the paper-covered room dividers or sliding doors that open out on to a hall. Sh?ji use a particular kind of paper known as washi. Washi is fashioned from the lengthy fibres obtained from plants such as the paper mulberry (Broussonetia kazinoki x B. papyrifera), and the oriental paper bush (Edgeworthia chrsysanthia). The blend of such fibres produces a tough paper, which can also absorb dust, provide insulation, and filter out ultraviolet ray, in addition to other properties. The paper is also easily recovered.