If you’re thinking of using charcoal-based products in the home, you’ll want to know what type and how much to use. Masuda Satoshi of Masuda-ya Co., Ltd., says, “binchotan charcoal is made at a very high temperature and has an alkaline effect. It’s ideal for treating drinking water because it removes chlorine and other noxious substances.
Also, it stays hard in the water, so it doesn’t release any powdery material. If you put 50 to 60 grams in one liter of tap water, you’ll increase the mineral content and soften the water, making excellent drinking water. If you use charcoal as a humidity regulator and odor absorber, you’ll need 8 kg for a room area of around 10 to 13 m2.”