阿胶是由驴皮经挑皮、浸泡、脱毛、清洗等清洁后加水熬制而成 ,由于驴的生长期较长 ,其皮毛中藏有很多污物 ,驴皮的采购过程中也有少法商人掺杂泥砂等现象 ,如果清洗不彻底很容易带到胶中 ,造成阿胶的灰分含量过高。熬胶用的水也很关键 ,现代熬胶基本使用的是井水或蒸馏水 ,井 The donkey-hide gelatin is made by the skin of the donkey skin, soaked, depilated, washed, etc. After cleaning, it is made by adding water. As the donkey’s growing period is long, there are a lot of dirt in the fur, and there are also minor businessmen in the purchase process of the donkey hide. Doped sand and other phenomena, if not thoroughly cleaned, can easily be brought into the rubber, resulting in high ash content of donkey-hide gelatin. The water used for silicone is also very important. The modern silicone is basically used with well water or distilled water.