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在幻灯片需求数量不多的情况下,可采用反转冲洗法制作幻灯片.反转冲洗法可一次加工成正片,与拷贝法相比具有时间短、工序少、成本低等优点,因而很多参考书、电教杂志上都介绍了黑白反转幻灯片的制作方法.但是,我们通过多次反复的实验,证明:如欲获得质量较高的幻灯片,除了熟练掌握拍摄时的用光、光圈大小、曝光时间长短、以及冲洗工艺外,还必须注意以下几个方面的问题.1 根据实际情况选择恰当的感光胶片黑白负片和黑白电影正片均可采用反转法制作出黑白幻灯片,但这两种感光胶片都各自
In the case of a small number of slides, the reverse washing method can be used to make slides.Reflective rinse method can be processed into a positive film, compared with the copy method has a short time, fewer processes, low cost, etc., and many reference Books, audio-visual magazines have introduced black and white reversal slides production method However, we repeatedly through repeated experiments, to prove: If you want to obtain high quality slides, in addition to proficiency in shooting time, aperture size , The length of exposure time, as well as the process of washing, but also must pay attention to the following aspects of the problem .1 According to the actual situation to choose the right photographic film Black and white negatives and black and white positives can be made using black and white slide reversal method, but the two Photographic film is their own