一、引言自由基照相是在五十年代末期发展起来的一种非银盐照相,它是指在光或离子辐射作用下,感光层中产生自由基,在自由基作用下,生成染料或破坏染料的照相方法。该法由于具有干法操作,实时显示,不同片种可以产生不同颜色,分辨率很高及灵敏度较高等优点,六十年代在航空复制及缩微照相等方面得到实际应用,受到人们的极大重视。目前在美国、日本、西德、比利时、苏联及波兰等国已开展研究。近年来,我们根据国内的实际情况,开展了FR-1,FR-2,FR-3及FR-5等四种自由基片的研究工作。对片子的某些性能进行 I. Introduction Free-radical photography is a non-silver photography developed in the late 1950s. It refers to the generation of free radicals in the photosensitive layer under the action of light or ions and the generation of dyes or destruction under the action of free radicals Dye photography method. Due to its advantages of dry operation, real-time display, different types of tablets can produce different colors, high resolution and high sensitivity, the method has been widely used in aerial reproduction and micrography in 1960s . Currently in the United States, Japan, West Germany, Belgium, the Soviet Union and Poland have carried out research. In recent years, according to the actual situation in our country, we have carried out research work on four kinds of free-radical films such as FR-1, FR-2, FR-3 and FR-5. Some of the performance of the film