福达ISO 400染料型黑白胶卷在刑事照相中的应用

福达ISO400染料型黑白胶卷是采用福达彩色底片工艺生产的，经C－41彩色片冲洗法加工后能形成黑白画面，由黑色染料构成，而非传统的金属银影。根据作者经验，此胶片宽容度大，能生成不同反差的影像，且价格不高，冲洗方便，因此很适宜用於刑事照相。

Use of Fuda ISO 400 Dye-type Black-and-white Roll Film in Criminological Photography

Fuda ISO 400 black-and-white roll film is manufactured by Fuda color negative technology, it can be processed with normal color film C-41 process and yield black-and-white picture composed by black dye and not conventional metallic silver. According to the author' s experience, this film has a very large exposure lattitude yielding different image contrasts, not expensive, easily processed in laboratories, thus is very convenient for anti-crime photography uses.