观察后的金相样品,有时委托单位要求收回(如贵重或稀有金属),有时遇到不能破坏的大型铸件的金相样品而需要保存者,有时各厂矿需要金相样品的交流,在这种情况下,最好是能将金相样品复制下来,以便保存或交流。为了解决这个问题,我们利用废弃的照相底片使其溶化成胶质溶液来复制金相样品复膜。在废弃的照相底片中,必须挑选片基材料为硝酸 Metallurgical samples after the observation, sometimes requested by the commission to recover (such as precious or rare metals), sometimes met the unshakable large castings of the metallographic samples and the need for preservatives, and sometimes the need for factories and mines exchange of metallographic samples, in this In the case, it is best to copy the metallographic sample for preservation or communication. In order to solve this problem, we use the abandoned photographic film to dissolve into a colloidal solution to replicate the metallographic sample. In obsolete photographic film, the base material must be selected as nitric acid