Abstract: Objective To explore a new technique for identification of the formation of Indian seals. When microscopic examination is used to observe the phenomenon of obvious color mixing, how to comprehensively apply various inspection techniques to form the inner conviction of the formation of the seal. Methods The 3D shape profilometer test and the static voltage trace test were used. Results It was found that the laser prints had a positive difference in height, and the 3D contour image showed that the height of the printed matter was higher than the reference surface. The height difference of the inkjet printing was negative, and the 3D contour image was displayed. The height of the printed text is lower than the reference surface. Using the static voltage trace test method, the results of laser printing and inkjet printing and static voltage tracer are all white, and most of them can detect the mechanical indentation of the printer. Conclusion It is of theoretical value to explore the formation of seals from three-dimensional form, which meets the requirements of identification practice.

Key words: 3D shape profilometer, static voltage tracer, forming method of stamp impression, Inspection technique

摘要： 目的 探索印文形成方式鉴定的新技术，用显微检验法未观察到明显的混色现象时，如何综合运用各种检验技术，形成对于印文形成方式的内心确信。方法 使用3D形状轮廓测量仪检测法和静电压痕仪检验法。结果 使用3D形状轮廓测量仪检测，发现激光打印印文高度差均为正值，3D轮廓图像显示印文高度均高于基准面；喷墨打印印文高度差均为负值，3D轮廓图像显示印文高度均低于基准面。运用静电压痕检验法，激光打印印文与喷墨打印印文静电压痕仪显现结果均为白色，且多数可检见打印机机械压痕。结论 从三维形态探索印文形成方式具有理论价值，符合鉴定实践要求。

关键词: 3D形状轮廓测量仪, 静电压痕仪, 印文形成方式, 检验技术