片基上有灰尘,涂上乳剂后对胶片照相性能有不良影响。如尘埃附在整理后的片子上(曝光与显影前后片子有灰尘)会影响影象质量,放映时还会擦伤影片。因此,胶片制造过程中消除片上积尘至关重要。尘埃多来源于环境大气,但胶片制造过程中切片打孔也能引超尘埃。所以胶片上积尘虽然难免,但除尘净化也实为必要。 Dust on the film base, coated with emulsion adversely affected the photographic performance of the film. Such as dust attached to the finishing of the film (exposure and development of film before and after the dust) will affect the image quality, screening will scratch the film. Therefore, the film manufacturing process to eliminate dust on the film is essential. Dust mostly from the ambient atmosphere, but the film manufacturing process can also lead to ultra-fine hole drilling. Therefore, although the dust on the film is inevitable, but dust removal is also necessary.