由于晒图时的光亮强弱、温度高低的不同,图纸感光的时间就不一样,所以控制好曝光时间,是保证晒图质量很关键的一步。在实践中,我发现被透明纸复盖的图纸“底色”与其外“图色”相比呈现“极浅兰色”为最佳,此色约为未经感光的图纸原色的1/20～1/50,而肉眼观察,有时只能控制到“浅兰色”,最犯忌是“底色”与其外的图色一样白或“底色”为兰色。为了保证晒出满意的图纸,可准备一张在阳光下充分感光达2～3分钟的“标准图纸”,以备比较之用。具体晒法分以下二种:(一)机器电光晒图:可利用机器内部透出的一线亮 Due to the intensity of light and the difference in temperature, the drawing time is not the same, so controlling the exposure time is a key step to ensure the quality of the print. In practice, I found that the “background color” of the drawings covered by the transparent paper is “very light blue” compared with the “picture color” of the outside. This color is about 1/20 of the original color of the unsensitized drawing. ~ 1/50, and the naked eye, sometimes only control to “light blue”, the most taboo is the “background” and the outside of the picture as white or “background” as blue. In order to ensure the satisfaction of the drawings, you can prepare a “standard drawing” that is fully exposed to sunlight for 2 to 3 minutes for comparison purposes. The specific drying method is divided into the following two types: (1) Machine electro-optical drying map: The first line of light that can be used inside the machine can be used