本文论述已显影加工黑白银盐缩微胶片的各种衰变现象与保存方法。其中包括聚酯片基胶片乳剂层剥离形成空隙产生彩色牛顿环 ;各种胶片在长期保存中乳剂层析出甘油及其衍生物 (硝酸甘油酯、对苯二甲酸甘油酯等 ) ;影像银扩散迁移 ,在海波残存量极少的银影像高密度部位形成带蓝色的“银镜” ,在银影像低密度部位 ,因海波残存量多迁移的银离子被它分解出的硫化物俘获形成硫化银 ,使该部位的影像产生黄变 ;多产生于缩微片与航测片上的氧化还原斑是由多个不同颜色的同心或近似同心圆构成 ,它像金属锈蚀的机理一样 ,在氧化剂、电解质与水分存在下形成。简述了“醋综合症”的现象、影响因素、衰变机理等。缩微胶片的保存一般在创造一个良好宏观环境同时 ,再应用防酸除酸复合材料或分子筛、胶片保护片创造一个微环境 ,是目前最有效的保存方法。在三种材料中防酸除酸复合材料作用最强 This article discusses the processing and processing of black and white silver salt microfilm various decay phenomena and preservation methods. Including the polyester film base film emulsion layer peeled off to form a color Newton ring; all kinds of film in the long-term preservation of glycerol and its derivatives (nitroglycerin, terephthalate, etc.); silver diffusion Migrate to form a silver-colored “silver mirror” in the high-density areas of the silver image with very few remaining waves, and silver ions migrated in the low-density part of the silver image due to the remnants of the waves are trapped by the sulfide they decompose The formation of silver sulfide, so that the image of the site yellowing; more produced in the microtensile and aerial photography on the redox spot by a number of different colors concentric or approximately concentric circles, which is the same as the mechanism of metal corrosion, oxidant, Electrolyte and moisture form. The phenomenon, influencing factors and decay mechanism of “vinegar syndrome” are briefly described. The preservation of microfilms generally create a good macro environment at the same time, then the application of acid-resistant acid-scavenger composite or molecular sieve, film protection film to create a micro-environment, is the most effective preservation method. Among the three materials, the acid-proofing and acid-resisting composite material has the strongest effect