Charcoaling in heaps堆积制炭法
The best condition on decolorization with activated charcoal is, 40 minutes, the temperature of water is 80℃, the weight of activated charcoal is 3g, the number of times in decolorization is 2.
3．活性碳脱色最佳条件：时间为40分钟，水温80℃，活性碳量3g，脱色两次，能达到最佳脱色效果。
参考来源 - 紫草抗人乳头瘤病毒的作用物质研究N-UNCOUNT（不可数名词） Charcoal is a black substance obtained by burning wood without much air. It can be burned as a fuel, and small sticks of it are used for drawing. 木炭