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档案缩微品不同于一般的资料缩微品,它不仅要提供利用,而且要永远地保存下去,并能保证在拷贝四代后仍是清晰可读的。所以,缩微品的质量是至关重要的。为了使档案缩微品的质量达到长期、永存的目的,我们就应该在档案缩微品的制作过程中,进行技术监控及技术性能指标的检验工作。一、档案缩微品的技术监控档案缩微品的技术监控就是指在制作档案缩微品的各个阶段要严格地按技术规范和要求认真检查和操作。其主要注意事项包括以下几个方面: 1、缩微摄影机和照明灯的电压在拍摄过程中电压不稳会使影象密度发生变化,严重影响画面的清晰度。因此,为了保证拍摄时电压的稳定,一般应使用293A记录式电压表和电力线监视器的稳压器来调整好缩微摄影机的电压,当其达到稳定状态时再开始工作。此外,灯压不稳或灯泡老化变暗达不到拍摄档案文件时所要求的照度,也会影响影象画面的密度。所以,经常检查和按规定更换灯泡也是保证影象密度质量的重要措施之一。
File microfilm is different from the general information microfilm, it not only to provide access, but also to preserve forever, and to ensure that after the copy of the fourth generation is still legible. Therefore, the quality of the microfilm is crucial. In order to make the quality of archives microfilm achieve long-term, eternal purpose, we should carry out inspection of technical monitoring and technical performance index in the process of making archives microfilm. First, the file microfilm technical monitoring Archive microfilm technical monitoring refers to the production of archives microfilm in all stages of strict accordance with the technical specifications and requirements carefully examine and operate. The main precautions include the following aspects: 1, the voltage of the micro-camera and the lighting voltage instability in the shooting process will make the image density changes, seriously affecting the clarity of the screen. Therefore, in order to ensure the stability of the voltage when shooting, the general should use the 293A voltage meter and power line monitor regulator to adjust the micro-camera voltage, when it reached a steady state and then start working. In addition, the lamp voltage instability or darkening of the lamp does not reach the shooting archives required illumination, will also affect the image density of the screen. Therefore, regular inspection and replacement of bulbs according to the regulations are also one of the important measures to ensure the image density and quality.