Abstract: Stamps made from photosensitive materials have self-stored ink paste. They have tiny holes on the surface. With fine production craft and high degree of automation， this kind of stamps is easy to copy and difficult to identify. However， the characteristics of micro-holes on stamps are specific， stable， reflective and unduplicatable. They reflect the unique features of every individual stamp， therefore， they are the important evidence in the identification of photosensitive stamp impressincs.

Key words:  , photosensitive stamps, micro-holes, structure, characteristics

摘要： 光敏印章是自储油印章，印面由细小微孔构成，其制作精细，自动化程度高，易仿难辨。但微孔特征具有特定性、稳定性、反映性和不可复制性，能够反映印章的微孔状况的个体特异性，因此，它是光敏印章印文鉴定的重要依据。

关键词: 光敏印章, 微孔, 微孔结构, 微孔特征