average gradient

The application of stabilizer in lithographic film were detailedly reported, respectively.

介绍了银盐稳定剂的发展概况,举出几种典型稳定剂的合成路线,重点介绍了银盐稳定剂在平印胶片中的应用。

In the large size photograph and high resolution film camera, film flattening is one of the most important technolgoies to the camera.

在大画幅、高分辨力的相机中 ,胶片展平是其关键技术之一。