在刑事案件现场上 ,经常发现无法清晰提取下来有价值的痕迹物证。如光滑表面材料上的物证及反光性较强的同颜色痕迹。最典型的为瓷砖上与瓷砖颜色相同的油漆痕迹。这类痕迹 ,在可见光下 ,由于和载体无反差 ,所以不能通过直接拍照获得。通过实验发现不同油漆对红外光的透过、吸 On the scene of criminal cases, it is often found that valuable evidence of evidence can not be extracted clearly. Such as smooth surface material evidence and reflective of the same color traces. The most typical is the trace of paint on the tile with the same color as the tile. Such marks, in the visible light, because there is no contrast with the carrier, it can not be obtained by direct camera. Through the experiment found that different paint on the infrared light transmission, absorption