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Yoshino Tissue: Kozo Paper So Thin Fifty Sheets Weigh 35 Grams (Nibu, after Rein 1889)
Yoshino-gami from Nibu in Yamato was the finest tissue of Japan: so thin that fifty sheets weigh 35 g, yet so strong that lacquer makers wrung thick lacquer through two or three layers and used them again. Light, tough tissue like this is what covers model wings.
Result: kozo tissue, sheets 48 x 25.5 cm, 50 sheets 35 g (about 5.7 g per square metre).
Source: J. J. Rein, The Industries of Japan (1889), pp. 399-405. Not given: amounts per vat, lye strength, beating time. Picture drawn by Youblob.
Avanzado
3 days
Instrucciones
1
1
Clean the bast
Clean the bast
Take kozo bast freed of the dark outer skin and green parts, and cut out knot-holes and faulty spots.
Materiales para este paso:
Corteza de kozo1 as required2
2
Boil in ash lye
Boil in ash lye
Boil the bast in an iron kettle with lye made from ashes, half an hour to three hours, until it is soft and crushes between the fingers.
Herramientas necesarias:
Lejía de ceniza de madera
Hervidor de hierro3
3
Wash clear
Wash clear
Wash the soft bast in a tub of fresh water, changing it four or five times until the water stays clear.
Materiales para este paso:
Agua1 as requiredHerramientas necesarias:
Tina de madera4
4
Beat to pulp
Beat to pulp
Lay the wet bast on a thick hardwood board and beat it with oak hammers of 1 to 2 lb, stirring and mixing in water often, until it is an even fibrous pulp. If the fibres are not yet apart, boil it again in plain water.
Herramientas necesarias:
Tabla de madera plana
Mazo de maderaHervidor de hierro5
5
Charge the vat
Charge the vat
Put the pulp in the vat with water. Press out Nori-no-ki (Hydrangea paniculata) bark in water and add the slippery mucilage; it keeps the fibres floating apart. Ours: press the bark out in a linen bag.
Materiales para este paso:
Corteza de nori-no-ki (Hydrangea paniculata)1 as requiredAgua1 as requiredHerramientas necesarias:
Cuba
Bolsa de lino6
6
Scoop one thin layer
Scoop one thin layer
Dip a mould of fine bamboo sticks bound with silk thread and let the stuff flow toward you, so the fibres lie parallel. Fill it once only: a second, crossed filling makes a thicker paper.
Herramientas necesarias:
SugetaCuba7
7
Pile and dry on boards
Pile and dry on boards
Pile the wet sheets on a mat with bamboo splints between them. When dry enough, brush each onto a smooth board and stand it slantwise in the sun; the dry sheet comes off by itself.
Herramientas necesarias:
Estera de bambú
Brocha anchaTabla de madera plana8
8
Check the tissue
Check the tissue
Sheets 48 x 25.5 cm; fifty of them should weigh about 35 g. The tissue is yellowish, silky and strong enough to be wrung without tearing.
Materiales
3- 1 as requiredMarcador de posición
- 2 as requiredMarcador de posición
- 1 as requiredMarcador de posición
Herramientas requeridas
10- Marcador de posición
- Marcador de posición
- Marcador de posición
- Marcador de posición
- Marcador de posición
- Marcador de posición
- Marcador de posición
- Marcador de posición
- Marcador de posición
- Marcador de posición
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