旧银质饰品实验室法翻新山东济宁农校（２７２１３１）李兆楼银质饰品或器皿天长日久会渐渐发暗而失去美丽光泽，如何进行翻新呢？通过第二课堂活动对此作了实验探讨．现总结我们的方法如下：１．将银质饰品放入２０—３０％的双氧水中，浸泡５—１０分钟、银质表面会产生... Refurbishment of laboratory facilities for old silver jewelry Shandong Jining Agricultural University (272131) Li Zhaolou silver jewelry or utensils will gradually become dark and lose beautiful luster. How to refurbish it? This experiment was explored through the second classroom activity. Summarize our approach is as follows: 1. Put silver jewelry into 20-30% hydrogen peroxide, soak for 5-10 minutes, silver surface will produce...