１９９９年４月 ８日，我市某单位财务室被盗，损失现金共２３万元人民币。现场勘查中，在案犯出入口窗户外面走廊上提取到矿泉水瓶一只，瓶颈处有点状水迹，经 ５０２胶熏显（无加湿），于瓶颈水迹处显现出汗游指印一枚，但大部分纹线被５０２聚合物掩盖，经尝试，运用液体浸 April 8, 1999, the financial office of a unit in our city was stolen, a total loss of 230,000 yuan in cash. Scene investigation, the case of entrances and exits outside the window to the hallway to extract a mineral water bottle, bottleneck at a bit like water marks, the 502 gum smoked significant (no humidification), in the bottleneck traces appear Sweat Tour fingerprints, but large Part of the ridge was covered with 502 polymer, after an experiment, the use of liquid immersion