放大机的底片夹上下均为玻璃片,实际使用中发现,这两块玻璃有两个缺点:①放制整卷胶卷时,移动的胶片始终与玻璃摩擦,导致底片发“花”,降低放制效果;②底片夹的玻璃片易“藏污纳垢”,尽管每次使用前擦试,操作中难免给片夹中带入灰尘,使放出的照片产生“雪花”。 为了解决以上底片夹的缺点,笔者大胆将片夹的上下两片玻璃拆除,用 Amplifier film clips are up and down the glass, the actual use of the two pieces of glass have two drawbacks: (1) the whole roll of film production, the film is always moving friction with the glass, resulting in the film made of “flowers” and reduce the release The effect; ② negative film clip glass easy to “dirt”, although before each use of scratch test, the operation will inevitably bring dust into the film clip, the release of the photos have a “snowflake.” In order to solve the shortcomings of the above film clip, I boldly remove the upper and lower two pieces of glass clip, with