时间因素对显微法判定打(复)印文件朱墨时序的影响研究

Research of Time Factors on Microscopic Results of Identification of the Sequence between Stamps and Printed/Copied document

目的朱墨时序鉴别是文件检验领域的难题之一,其判定受色料组合等多种因素影响。通过用显微法判定打(复)印文件与印文形成交叉后时间因素对检验鉴定结果存在的影响进行研究,为朱墨时序鉴别提供理论支撑。方法用显微法前后间隔30个月对光敏印文、原子印文、印泥印文与打(复)印文件形成不同组合的朱墨时序同一个交叉部位进行两次检验,研究前后两次检验图片间的变化。结果光敏印文、原子印文与打(复)印文件形成不同组合的朱墨时序,两次检验图片无较明显变化;而印泥印文与打(复)印文件形成不同组合的朱墨时序,后一次检验较第一次检验时显微图片有较明显的变化。结论虽然印泥印文与打(复)印文件形成不同组合的朱墨时序前后两次显微检验图片有较明显的变化,但只要能够准确把握朱墨时序判定的依据,仍可以正确地对印泥印文的朱墨时序进行判定。因此30个月的检验间隔对显微法判定打(复)印文件的朱墨时序无显著影响,此研究为朱墨时序鉴别提供了一定的参考依据。

Objective Identification of the sequence between stamps and strokes is one of the key issues in the field of document inspection,which is affected by many factors such as the combination of pigments,etc.Microscopy was employed in this paper to study the influence of time factors on the inspection and identification results after the crossing between the stamps and the printed or copied document.Theoretical support was provided for identification of the sequence between stamps and strokes.Methods The microscopy was employed to conduct twice inspection on the same crossing position of the different combination of the photosensitive stamps and printed/copied document,the atomic stamps and printed/copied document,as well as the inkpad stamps and printed/copied document,lasting 30 months.The changes between the former and later pictures were investigated.Results There were no obvious changes for the twice pictures of the combination of the sequence between the photosensitive stamps and and the printed/copied document,as well as the combination of the sequence between the atomic stamps and the printed/copied document.However,obvious changes were appeared between the former and later pictures for the combination of the sequence between the inkpad stamps and the printed/copied document.Conclusions Although there were obvious microscopic changes for the combination of the sequence between the inkpad stamps and the printed/copied document,the correct results could be identified, as long as the basis for the identification of the sequence between the stamps and strokes was grasped accurately. Therefore, the time factors of 30 months had no obvious effects on the microscopic identification of the sequence between the stamps and the printed/copied document. Theoretical support was provided for identification of the sequence between stamps and strokes in this study.