朱象贤所撰《印典》“释印”中言:“印,信也。所以封物为信验也。亦言因也,封物相因付也。”(1)蔡邕《独断》亦云:“玺者,印也。印者,信也。”这便表明,古代印章的主要功能之一,便是做徵信验证之用的,故亦称印信。我国的印学史始自春秋战国,先秦以来延绵不绝,流变过程中依其功用,分化成多种类别和形制,大类如历代官 In the words of Zhu Xianxian, “Seal”, “Seal”: “The seal is also a letter, so the seal is a matter of confidence. ”This shows that one of the main functions of the ancient seal is to use for credit verification, it is also known as Yinxin. Since the beginning of the Qin dynasty, the history of Chinese printing and studying began in the Spring and Autumn Period and in the Warring States Period. According to its function, the history of printing and studying in our country differentiated into various categories and shapes.