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在档案缩微品制作过程中,如何保证大批量的缩微品中每幅影像质量都能满足阅读和拷贝的要求,是缩微技术本身的任务,也是工作中的技术难点。 我们采用了正式拍摄前进行逐级曝光试验的方法解决操作技术问题,使缩微品各项技术指标都达到我馆内定的标准。 逐级曝光试验大体可分为:拍摄前准备工作、缩微拍摄工作、胶片冲洗工作、母片影像检测工作、逐代拷贝工作、缩微品质量评价和拍摄 曝光量确定工作。
How to ensure that every image quality in large quantities of microfilm can meet the requirement of reading and copying is the task of microfilm itself and also a technical difficulty in the work of archives microfilming. We adopted the method of step-by-step exposure test before the formal shooting to solve the technical problems of operation, so that the technical indicators of the microform products meet the standards set by our museum. Gradual exposure test can be divided into: preparatory work before shooting, microfilming work, film processing, master image detection, copy-by-generation work, the quality of microfilm evaluation and shooting exposure determination.