在现场勘查过程中,如果我们分析犯罪分子的手可能触碰到了现场的墙壁,那么就应该对墙壁上的汗潜指印进行必要的显现操作。但是在基层技术室的工作中,受勘验装备器材的限制,对于石灰墙壁这类比较特殊的客体往往束手无策。日常工作中,我们摸索出对石灰墙壁上新鲜指印提取的最简单而又最实用的方法技巧:喷撒碳粉法。 During the site investigation, if we analyze the hands of criminals who may touch the wall of the site, then the sweat latent fingerprints on the wall should be displayed as necessary. However, in the work of grassroots technology rooms, the limitation of the equipment for the inspection of the equipment is often beyond the reach of such relatively special objects as the lime-wall. In our daily work, we have explored the simplest and most practical method of extracting fresh fingerprints from the lime walls: spraying toner.