醋酸综合症对电影胶片影像影响研究

醋酸综合症是醋酸纤维素酯电影胶片特有病害现象,是威胁其安全保存的主要因素。醋酸综合症导致电影胶片的几何尺寸改变、机械强度降低、影像信息严重受损。本文采用基恩士VK-X250K形状分析激光显微镜研究了醋酸综合症电影胶片片基层表面粗糙度;采用XRite Model VS450分光光度计研究了其表面对可见光的反射率。实验结果表明胶片发生醋酸综合症之后,其表面粗糙度增大,对可见光的漫反射增强。由此可以说明醋酸综合症发生之后,胶片表面析出的增塑剂形成粗糙界面,对可见光的漫反射增强,在放映过程中透射光减弱,这是胶片记载影像受损的主要因素。

Effects of Acetic Acid Syndrome on Film Images

Acetic acid syndrome is a special disease phenomenon of cellulose acetate film,and is the main factor threatening the safety of cellulose acetate film. Acetic acid syndrome caused the change of size, brittleness of the film base, severe damage of the image. In this paper, the Keyence VK-X250K shape measurement laser microscope was used to study the surface roughness of the base of syndrome acetate film, and the X-Rite Model VS450 spectrophotometer was applied to study the reflectivity of the film surface to the visible light. The experimental results show that the surface roughness and reflection to visible light increase when the acetic acid syndrome occurs. Thus, it can be explained that when the acetic acid syndrome occurs, the rough interface is formed due to precipitation of the plasticizer, which leads to the enhancement of the reflection to visible light. The attenuation of transmission light is the main factor leading to the damage of the recording image.