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我国目前通用的幻灯片仅35毫米规格一种(以下简称通用幻灯片),画面面积为24×36 mm即135相机所摄画面,(下文所述幻灯片的规格均指画面面积)。大于135画面的底片制作幻灯片时需经过“三反三复”过程即:其缺点是流程长,花费时间多;过程繁杂、底片层次丢失多;“三反三复”材料消耗大;画面小容量不多。为克服上述不足,我们经过周密设计、反复试验发现了用大底片(电镜底片、一般120底片)由放大机直接制作阔幅幻灯片的简易方法。介绍如下:一、器材:放大机一部;120照相机一台并配置附加镜一套;定时器一台;安全灯一台(红色);通用幻灯片夹(纸质)若干;SO软片若干备裁。二、操作过程
Our current general slide only 35 mm format (hereinafter referred to as universal slide), the screen area of 24 × 36 mm or 135 camera picture, (the slide specifications described below refer to the picture area). More than 135 screen film production slides need to go through the “three anti-triple-recovery” process that is: the drawback is that the process is long, take more time; complex process, the loss of more negative layers; “three anti-triplex” material consumption; Small capacity. In order to overcome the above shortcomings, we have carefully designed and tested the simple method of producing a wide-format slide directly from a magnifier using a large negative film (electron microscope film, typically 120 negative films). Introduced as follows: First, the equipment: a magnifying glass; 120 a camera and configure a set of additional mirror; a timer; a safety light (red); Universal slide folder (paper) number; Cut Second, the operation process