[读者来信]感光材料编辑部: 多年来,我国感光材料发展缓慢,原因很多。其中很重要一点就是缺乏交流,缺乏争鸣。谁都知道,我国胶片质量存在不少问题,各厂虽然做了一些工作,但很少在商品材料上有重大突破。关键问题在于看法不统一,缺乏交流。其实各厂在局部工作上都有一些进展,但往往由于各自思路所限,进展到一定程度就难以突破。也有些单位,因为人为障碍或压力,工作上虽有了 [Letters from readers] Photographic Materials Editorial Department: For many years, the photographic materials in our country have been developing slowly for many reasons. One of the most important points is the lack of communication and lack of contention. Everyone knows that there are many problems with the quality of film in our country. Although some work has been done by each factory, there are few major breakthroughs in the commodity materials. The key issue is the disagreement and lack of communication. In fact, some factories have made some progress in their local work. However, due to limitations of their respective ideas, the progress made to a certain extent is hard to break through. There are also some units, because of man-made obstacles or pressure, although there is work