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.
|The fir grows up rapidly, easily to get it, actually it belongs to a man-made plantation which was encouraged and arranged to be planted by the government. (Not those type of forest prohibiting on cutting and chopping timber), it will take only 15 years from seeding to growing up for being used. Can be repeatedly grows to match with world advocated concept of "Green Building". The very little left part of sapwood after cutting can be re-used as filler for the light concrete to reach the goal of zero garbage.|