Oriental Papermaking Fibres

Cedar, Japanese

Common Name Cedar, Japanese Japanese Name Sugi
Scientific Name Taxodiaceae Cryptomeria Japonica
Fibre Length Average 2.5mm (2-3mm) Fibre Width Average 35µm (30-40µm)
Fibre Ends Cross-Marking
Associated Cells
Herzberg Colour Yellow/Brown Graff 'C' Colour Yellow/Brown


Native to Japan, this tree also grows in southern China and Taiwan. Actually a conifer, it is not related to other cedars. It is an evergreen, growing up to 70 metres in height and 4 metres in width. Extensively cultivated in Japan and China, the timber is often used in construction, furnishing and panelling where its light weight, strength, water resistance and scent are appreciated. Its pollen is also a major cause of hayfever. In Japan Japanese Cedar from around Kyoto is particularly valued, and is refered to as Kitayama Sugi. Pits are taxodiod, usually in 1-2, sometimes 3 spaced across the fibre width (see Image 2). There is a lack of ray tracheids pits. Cross field areas are very low. Earlywood tracheids are thin walled [14]. Fibres are associated with a variety of parenchyma cells that stain blue or purple. While this sample stained these colours, it is important to note that softwood pulps stain different colours dependant upon its processing. The vivid yellow colour of this sample is potentially indicative of groundwood, or a medium to well cooked sulfate pulp. It is important to refer to the ASTM Standard[1] for more information regarding colour ranges for various methods of processing softwood pulps.

Image 1 Image 2
cedar1 cedar2


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Contact email address: travtora@gmail.com
Centre homepage: www.culturalconservation.unimelb.edu.au
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