烧毁复印纸的提取、显现方法研究

目的建立科学的提取、显现烧毁复印纸的方法。方法制备烧毁复印纸,对比喷雾法、气熏法、涂刷法、水漂法、发胶喷雾法对烧毁复印纸的摊平软化效果;对比夹板固定法和胶带粘取法对烧毁复印纸的固定效果;对比光学检验法、化学显现法对烧毁复印纸文件的显现效果。结果喷雾法摊平软化效果整体上优于其他方法;夹板固定法可适用于大多数烧毁复印纸文件,胶带粘取法适用于打印类复印纸文件;光学检验可以显现出黑笔、蓝笔、红笔、2B铅笔字迹以及指印,化学显现可以更清晰地显现出黑笔、2B铅笔字迹。结论当烧毁复印纸烧毁程度不明确时,摊平软化可选用喷雾法;当烧毁复印纸内容需进一步检验时,固定优选用夹板固定法;显现烧毁复印纸应根据不同显现客体采取合适的方法。

A Study of the Extraction and Appearance Methods on Burned Copy Paper

Objective To Establish a method for extracting and displaying burned copy paper.Methods Prepare burned copy paper,compare the flattening and softening effects of spray method,gas fumigation method,brushing method,water drift method,and hair spray method.Compare the fixed effect of the splint fixing method and adhesive tape method to the burned copy paper,compare the effect of the optical inspection method and chemical display method on the burned copy paper.Results The spray method of flattening and softening effect is better than other methods on the whole.The splint fixing method can be applied to the most burned copy paper.The tape sticking method is suitable for printing type copy paper.Optical examination can show black pens,blue pens,red pens,2B pencils and fingerprint prints,and chemical displays can clearly show black pencil and 2B pencil handwriting.Conclusion When burning degree is not clear,the spray method can be used by flattening and softening.When the content of burned copy paper needs further examination,the splint fixation method is preferred.The proper extraction methods should be adopted according to different appearance acording to objects.