The material is derived from fir, after cutting, slicing, then "mineralize" it. (Means after special process together with additive can eliminate the wood nature and become ore-like material). Also stir with cement, and then press it via the mode to make it has the function of fire proof, acid resisting, anti-corrosive, won't have shape changing, against humidity, low heat conducting, high sound absorption , a kind of everlasting material. |