Abstract: The dissolving time of ball point pen inks of different age writings was measured at successive times and its relationship with the writing time was analyzed. The changing trend of the dissolving time was established and the threshold, which differentiates the freshness of writings, was determined. The method of successive measurements could be used to examine whether a ball point ink entry is written recently without comparison with standard samples.

Key words: ball point ink writing, writing time, successive measurement method

摘要： 通过研究相隔一定时间的多次测定数据的变化规律与书写时间的内在关系,建立了部分近期书写的圆珠笔字迹形成时间的检验方法,确定了相隔一定时间的两次测定数据的变化规律与书写时间内在关系的判定阀值。形成了无需对照样本即可判定部分圆珠笔字迹是否近期书写的检验方法。

关键词: 圆珠笔字迹, 书写时间, 多次测定法