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本文利用均匀设计法和正交设计法对圆珠笔油的薄层色谱展开剂进行科学地选择，通过实验得到了一组比较理想的展开剂系统。在此基础上，对不同厂家的圆珠笔油进行薄层分析，分离效果很好，为进一步研究字迹色痕的形成时间提供了参考依据。
In this paper, uniform design method and orthogonal design method of ballpoint pen oil TLC developer is selected scientifically, and a set of ideal developing agent system is obtained through experiments. On this basis, the thin layer analysis of ballpoint pen oil from different manufacturers, the separation effect is very good, which provides a reference for further study of the formation time of the written marks.