1.Function: absorbing light, insulating heat, absorbing sound, reducing noise, breathing, anti-skid, health protection, etc. 2.Characteristics: plain and coloury, light quality and environment protection, anti-slide and anti wear, insulation and fireproofing, water sucking and ventilating, strong strength, acid and alkali resisting, anti corrosion, no radiation, modulate air humidity and improve ecological environment. . Now, lava has become ideal natural green, environment protection and evergy-saving construction materials. It is favored and welcomed by large number of customers and has become the preferred construction materials of construction units and construction design departments.