CXD Special Selection Japanese papers – Tosa Kozo and new Nasu Kozo
As part of CXD’s continuing policy to help preserve the traditional hand-made paper industry, we have selected a new range of high quality Japanesepapers. Other cheaper Japanese papers commonly used in Western conservation have become known only by their names, which may have been changed from the original Japanese name to sell to the art market. These sometimes contain wood pulp, with fibres whichhave been chemically bleached and dyed to look natural. Traditional Tengujo, made from 100% Tosa kozo, used to be the finest and strongest paper in Japan. These days, various thinner machine-made kozo or hemp papers are sold as tengujo-type paper and the fibresource and manufacturing procedures may vary. Tosa is the ancient name of the Kochi Prefecture in Japan, where traditional Tengujo paper was made. One famous master paper maker who could make it died at the end of the 1990's, after having made one million sheetsof hand-made Tengujo during his lifetime.
High purity Tosa Kozo papers are now becoming much scarcer, due to the steady loss of important traditional papermakers, and lack of good quality fibres becauseof climate change. For these reasons, we will gradually replace our extremely popular Tosa Kozo range with Nasu-Kozo papers. Our traditional Nasu Kozo paper is made in the Fukui area of Japan, where they have used Nasu-Kozo for centuries. Nasu Kozo comes from Ibaragi prefecture north-eastof Tokyo and has shorter and finer fibres than Tosa Kozo.The short and glossy fibre of Nasu Kozo is likened to silk, while Tosa Kozo is likened to cotton.
The papers are made for us in sheet size 630 x 940mm and approximate gsm weights 12.2, 18.3, 30.6 and 49.0.
In Japan the traditional unit of measure for a paper’s weight is called a Momme which is about 3.75gsm.
(Other weights can be made to order – minimum quantities apply.)
Our standard stock is unbuffered with a pH not less than 7.0 -7.5.
CXD Special Selection Nasu Kozo papers are cooked with soda ash and dried on wooden boards.