取材：选取质地坚韧、叶脉明显、具有发达的木质纤维、形态完整的树叶，如桂花叶、白玉兰叶、含笑叶等，用清水洗净作材料。去叶肉：用大烧杯或小砂锅放入碳酸钠5g、氢氧化钠7g、水250ml，，在火上加热、搅拌，使药品溶化。药液沸腾时浸入材料。用镊子不断翻动，使各叶片彼此分 Drawn: Select the tough texture, obvious veins, with well-developed wood fiber, the shape of the leaves, such as osmanthus leaves, Magnolia leaves, smiling leaves, washed with water for materials. To the mesophyll: with a large beaker or small casserole into the sodium carbonate 5g, sodium hydroxide 7g, water 250ml ,, heated on the fire, stirring, the drug dissolved. Liquid immersion materials boiling. With tweezers constantly turning, so that each leaf points