正片负冲法照相提取痕迹物证

Finding Traces of Material Evidence by Using Diapositive Film Processed as Negative

彩色透明正片，即彩色反转片，以C-41工艺冲洗．可获得反差大、色饱和度高的负像，对于鉴别犯罪现象的痕迹物证极为有效。

Color Diapositive Film, i. e. color reversal film,can be processed with C-41 yielding a negative image performing higher contrast and higher color saturation very efficient for identifying traces of material evidence at crime site.