近年来，在许多经济案件中涉及到字迹色痕相对时间的检验。在分析这类问题时，除需要对纸张、笔迹进行鉴定外，还必须对字迹色痕的成份、形成时间进行检验。只有正确地判断墨水字迹色痕的成份，书写时间的异同，才能达到同一认定的目的。目前，关于墨水成份的分析方法较多，有 In recent years, there have been many tests of the relative chronology of smudges in many economic cases. In the analysis of such issues, in addition to the need for paper, handwriting identification, but also the composition of the letter marks, formation time to be tested. Only correctly determine the composition of ink marks color marks, writing similarities and differences in time, in order to achieve the same purpose. At present, there are many ways to analyze ink composition