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.