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答:磨砂是胶片的一种常见弊病,它使胶片表面发毛,画面不透明和影象模糊,严重地影响产品质量。磨砂现象由于产生原因及条件不同,因而其形态也就各不相同。根据资料介绍和生产实践,磨砂可分以下四种类型: 1.点状磨砂此类磨砂多发生于彩色片,往往由于成色剂析出引起的,尤以彩正黄层为多。2.皱纹状磨砂它是发生在胶片加工过程中往往由于乳剂层熔点低、粘牢度差、吸水膨胀过度以及加工药液温差大等原因引起的。胶片起皱凸起,在银幕上看呈不规则的暗条纹。
A: Scrub is a common film defects, it makes the film surface hair, the screen opaque and fuzzy image, seriously affecting the quality of products. Matte phenomenon due to different causes and conditions, so its shape will vary. According to the introduction of information and production practices, scrub can be divided into the following four types: 1. Dot scrub This scrub occurs in the color film, often due to precipitation caused by coupler, especially in the color of the yellow layer. 2. Wrinkle-shaped frosted It occurs in the film processing often due to the melting point of the emulsion layer is poor, poor fastness, excessive water swelling and temperature difference caused by the processing liquid caused. Film wrinkled raised, on the screen to see the irregular dark stripes.