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提取书写在墙壁、门窗、桌椅及其他器皿实物上的字迹,通常的提取方法是照像。但是在字迹色泽与载体的色泽相同或相近的情况下,由于反差不明显,所摄照片很难获得满意的效果,尤其不利于作笔迹鉴定。例如白色粉笔书写在白色墙壁上、铅笔书写在灰色砖瓦上等等。如果分别使用复写纸、印像纸复印提取,不仅可以获得清晰的效果,而且还可再翻拍成照片供作物证保存使用。此外对于书写在球状体和圆柱体上的字迹,影响照像拍摄角度的情况下,亦可采用此法。复写纸复印法根据所需提取的字迹大小,裁取所需尺寸大于物证字迹的复写纸,直接覆盖在字迹之上,上面再覆一层纸张,然后用手掌或其他软件物,反复擦压若干次,通过机械压力,便将粉笔、石膏或泥土块等书写成的字迹笔画粉状颗粒,移置到复印纸上形成反字,置于镜前便成镜像文字以供直接辨识,根据需要可再翻拍成照片以供使用。操作时如字径大于复写纸时,可用拼接法复印然后依据笔画线条衔接翻拍成整体文字内容。在用手掌擦压时,注意不可使复写纸移动,否则便会造成笔画重叠等现象。
Extract writing in the wall, windows and doors, tables and chairs and other utensils physical writing, the usual extraction method is to take pictures. However, when the color of the handwriting is the same as or similar to the color of the handwriting, it is difficult to obtain the satisfactory result because of the inconspicuous contrast, which is particularly unfavorable for handwriting identification. For example, white chalk is written on a white wall, pencils are written on gray tiles, and so on. If the use of carbon paper, respectively, printing paper copy extraction, not only can get a clear result, but also can be remade into a photo for preservation and use of evidence. In addition, writing on the spheroids and cylinders on the writing, the impact of the shooting angle of the case, you can also use this method. Copy paper copy method according to the need to extract the size of the script, take the required size is larger than the physical evidence of carbon paper, directly over the handwriting on top, then covered with a layer of paper, and then use the palm or other software, repeatedly wiping several times, By mechanical pressure, chalk, gypsum or clay blocks and other handwritten writing strokes powder particles, transposed to the copy paper to form the anti-word, placed in front of the mirror into a mirror for direct identification, according to the need to remake Make a photo for use. Operation, such as the font size is larger than carbon paper, the stitching method can be copied and then rewritten according to stroke lines into the overall text content. When rubbing with the palm of your hand, be careful not to move the carbon paper, otherwise it will cause the phenomenon of strokes overlapping.