Abstract: Objectives To study rules of artificial aging process of blue roller and gel inks. Methods Physical changes of 14 ink samples in different lighting conditions (darkness, daylight and artificial light) were compared; Chemical changes in different lighting conditions (darkness and daylight) were investigated by HPLC. Results Obvious physical changes were observed after inks were exposed to artificial light, while few in dark conditions. Relative quantities of color components changed with time in two stages for the first 30 days under natural lighting. Conclusion Physical properties could offer important information for dating of blue roller and gel inks, and combining with HPLC results, artificial aging process could be recognized.

Key words: HPLC, roller and gel ink, artificial aging

摘要： 目的对蓝色签字笔所形成的字迹色痕光老化规律进行研究。方法比对14种蓝色签字笔样品在暗处保存条件下、自然光照射及强灯光照射等老化条件下物理特征变化情况;使用高效液相色谱法,监测蓝色签字笔墨水中色料成分的变化情况,并寻找蓝色签字笔墨水字迹自然光老化规律。结果强灯光照射后出现外观明显的老化现象,暗处存放的样本存在较长的老化时限。在自然光照射下30天内,样品色料成分的相对含量均随时间发生两个阶段的变化。结论样本字迹的外观为鉴定蓝色签字笔墨水字迹的形成时间提供了重要的信息。结合HPLC分析结果,可以确认字迹是否经过光照人工老化,为字迹形成时间鉴定的重要参考依据。

关键词: 高效液相色谱法, 蓝色签字笔, 光老化