訂正日: 2008/11/27訂正理由: -訂正箇所: 論文抄録訂正内容: Wrong : The author has measured the water retained in the sheets made of the stuff both boiled and not boiled after pressing them at 20°C under various conditions, but no difference in the water content has been observed between them. From this, the water which is at the bottom of Wa is probably very small in its quantity. Therefore it is very difficult to determine the water of imbibition of the stuff by any pressing method.