化学实验时经常会碰到难于打开的玻璃塞或玻璃盖。许多资料都讲因凡士林干燥引起的玻璃塞或玻璃盖打不开,可用有机溶剂浸泡一定时间后打开。但在应用中不但成本高,而且溶剂易挥发,易燃烧不安全。经过实践,我发现可用以下方法。 Chemical experiments often encounter glass or glass covers that are difficult to open. Many sources say that glass stoppers or glass covers caused by petrolatum drying cannot be opened and can be opened after soaking in organic solvents for a certain period of time. However, the application is not only costly, but also the solvent is volatile, and it is not safe to burn. After practice, I found the following methods available.