Washi

Washi-making at Ise, Mie

By the 7th century, paper had been introduced to Japan from China via the Korean Peninsula, and the Japanese developed washi by improving the method of making paper in the Heian period. The paper making technique developed in Japan around 805 to 809 was called nagashi-suki (流し漉き), a method of adding mucilage to the process of the conventional tame-suki (溜め漉き) technique to form a stronger layer of paper fibers.[6][7][8][9] The improved washi came to be used to decorate religious ceremonies such as gohei, ōnusa (ja:大麻 (神道)) , and shide at Shinto shrines,[6] and in the Heian period, washi covered with gold and silver leaf beautifully decorated books such as Kokin Wakashu.[8]

In the Muromachi period, washi came to be used as ceremonial origami for samurai class at weddings and when giving gifts,[6] and from the Sengoku period to the Edo period, recreational origami such as orizuru developed.[10] During the Edo period, many books and ukiyo-e prints for the masses made of washi were published using woodblock printing.[11]

Origami cranes made of washi

Washi is produced in a way similar to that of ordinary paper, but relies heavily on manual methods. It involves a long and intricate process that is often undertaken in the cold weather of winter, as pure, cold running water is essential to the production of washi. Cold inhibits bacteria, preventing the decomposition of the fibres. Cold also makes the fibres contract, producing a crisp feel to the paper. It is traditionally the winter work of farmers, a task that supplemented a farmer's income.

Paper mulberry is the most commonly used fiber in making Japanese paper. The mulberry branches are boiled and stripped of their outer bark, and then dried. The fibers are then boiled with lye to remove the starch, fat and tannin, and then placed in running water to remove the spent lye. The fibers are then bleached (either with chemicals or naturally, by placing it in a protected area of a stream) and any remaining impurities in the fibers are picked out by hand. The product is laid on a rock or board and beaten.

Wet balls of pulp are mixed in a vat with water and a formation aid to help keep the long fibers spread evenly. This is traditionally neri, which is a mucilaginous material made from the roots of the tororo aoi plant, or PEO, polyethylene oxide. One of two traditional methods of paper making (nagashi-zuki or tame-zuki) is employed. In both methods, pulp is scooped onto a screen and shaken to spread the fibers evenly. Nagashi-zuki (which uses neri in the vat) produces a thinner paper, while tame-zuki (which does not use neri) produces a thicker paper.

With enough processing, almost any grass or tree can be made into a washi. Gampi, mitsumata, and paper mulberry are three popular sources.[1]

• Ganpishi (雁皮紙): In ancient times, it was called Hishi (斐紙). Ganpishi has a smooth, shiny surface and is used for books and crafts.
• Kōzogami (楮紙): Kōzogami is made from paper mulberry and is the most widely made type of washi. It has a toughness closer to cloth than to ordinary paper and does not weaken significantly when treated to be water-resistant.
• Mitsumatagami (三椏紙): Mitsumatagami has an ivory-colored, fine surface and is used for shodō as well as printing. It was used to print paper money in the Meiji period.

Until the early 20th century, the Japanese used washi in applications where Western style paper or other materials are currently used. This is partly because washi was the only type of paper available at that time in Japan, but also because the unique characteristics of washi made it a better material.

Washi is also used in watch dials.[12]

• Genkō yōshi
• Japanese tissue
• Rice paper
• Sir Harry Parkes
• Tissue paper
• Ukiyo-e

• Fukushima, Kurio (1991). Handbook on the Art of Washi. All Japan Handmade Washi Association.

Wikimedia Commons has media related to Washi.

• "Washi". Japanese Architecture and Art Net Users System.
• Washi Archived 2012-04-07 at the Wayback Machine