1.把300毫升清水注入烧杯里,并加入9克碳酸钠(俗名苏打),12克氢氧化钠(俗名烧碱),加热搅拌; 2.当药液沸腾时,把叶脉清晰而坚韧的树叶如桂花、冬青、月季、白杨、桑等的叶片浸泡在溶液中,继续加热10—15分钟,并用玻棒轻轻地不断翻动,使受热均匀; 1. 300 ml of water into the beaker, and add 9 grams of sodium carbonate (common name soda), 12 grams of sodium hydroxide (common name caustic soda), heated and stirred; 2. When the liquid boiling, the veins clear and tenacious leaves such as Osmanthus, holly, rose, aspen, mulberry and other leaves immersed in the solution, continue heating 10-15 minutes and gently flip with a glass stick, so that uniform heating;