BIO-ASH (TM) Realistic Black Coarse Biodegradable Volcanic Ash Particles - The latest invention from Thomas FX . . . . BIO-ASH (TM) Realistic Biodegradable Volcanic Ash Particles - fully biodegradable, made of food grade ingredients, extremely realistic, comes in coarse, medium, regular and fine; 6 cubic foot box will cover an area of 144 square feet (12'x12'x1") This product is ecologically safe, non toxic, non static and biodegradable! Call for details. From dark grey and black to brown and beige...FAKE ASH USED FOR FILM AND TELEVISION AND LIVE PERFORMANCES AND STILL SHOOTS.