一、声像档案的易损性１、照相底片和电影胶片我所库存底片和电影胶片最早是２０世纪６０年代的。我们的馆藏底片和电影胶片全系醋酸片 ,它们对温湿度要求苛刻 ,在高温高湿的环境里极易发生醋酸综合症。曾有人估计 ,我国解放前的电影胶片保存下来的只有１０ %左右。根据中国照 First, the vulnerability of audiovisual archives 1, photographic film and film I stock film and film inventory as early as the 20th century, 60’s. Our collection of negatives and films full of acetate film, they are demanding on the temperature and humidity, high temperature and humidity in the environment prone to acetic acid syndrome. It has been estimated that only about 10% of China’s pre-liberation motion picture film was preserved. According to China photo