复型样品是透射电子显微术中一种重要的样品形式,用它复印下金属样品组织的形貌和/或贴下第二相,来进行金属组织形貌学和晶体学的研究。传统的二次复型方法有两种:火棉胶-碳复型法和A.C纸复型法。前一种方法的优点在于复印的效果好,但溶去火棉胶膜所需要的时间长,通常约一周,用的有机试剂也多;而A.C.纸法,虽然消耗时间短,用的有机试剂少,但复印效果欠佳。最近,我们试验了一种使用稀、浓两种 Duplex samples are an important sample form of transmission electron microscopy that is used to make morphological and crystallographic studies of metal by copying the topography of the metal sample and / or the second phase. There are two traditional methods of secondary compounding: collodion - carbon compound method and A.C paper compound method. The advantage of the former method is that the copying is effective, but the time required for dissolving the collodion film is long, usually about one week, and there are many organic reagents used. However, although the AC paper method consumes a short time, the organic reagent Less, but poor copy quality. Recently, we tested a use of dilute, concentrated two