在大型容器的射线探伤中,常常使用γ源。由于在野外作业且曝光时间长,则天气对其影响很大。如在曝光时间内,胶片遭受了雨、雪乃至霜露而进水,不仅使胶片、增感屏报废,也浪费人力、物力、延长检验周期。 现介绍一种简单易行的防止胶片暗袋进水的方法。具体做法是,用市场出售的33.3mm(1寸)宽幅的胶带纸,将装有胶片的暗盒用胶带纸把暗袋帽与暗袋之间封死。首先将剪好长度为三倍暗袋宽的胶带纸平放,把暗袋如图1那样放在胶带纸上,然后将胶带纸两端分别从略宽于暗袋帽2～3mm处折回,如图2所示。折回后一定要将胶带纸与暗袋和暗袋 In large container radiography, gamma sources are often used. Due to work in the field and a long exposure, the weather has a great impact on it. Such as exposure time, the film suffered rain, snow and frost and water into the film, not only the film, screen sensory scrapping, but also a waste of manpower and resources, to extend the inspection cycle. Now introduced a simple and easy way to prevent film bag infiltration. This is done by sealing the film-loaded cassette with tape on a commercially available 33.3 mm (1 inch) wide piece of tape between the dark bag and the dark bag. First cut the length of three times the width of the dark bag of adhesive tape on the flat, the dark bag on the tape as shown in Figure 1, and then both ends of the tape from slightly wider than the dark bag cap 2 ~ 3mm at the return, as shown in picture 2. After the return must be tape and dark bag and dark bag