关键词: 纸龄, 禾草类纤维, 韧皮类纤维

Abstract:

This paper introduced the apparent features and identification methods of 14 categories of grass and bast fibers， which are commonly used in Chinese papermaking industry since ancient times. The appeared time and historical development of these fibers were also discussed， as well as the evolution of techniques and fiber composition. These are all the basic data for the identification of paper age in painting examination and questioned document examination. If the historical characteristics of fibers are consistent with the category features of chemical substances in paper， the identification of paper age will be reliable. 

Key words:

paper age, grass fiber, bast fiber