White ash is used to fill an incense burner as a base to support burning incense sticks, cones, makko trails, or charcoal (for wood chips, granules, pellets, pressed tablets). The ash is lightweight and breathable to permit the flow of oxygen to the surface. White ash is typically made from ash of wood or rice husks.
Store ash in airtight container, after using, sift through a fine mesh to remove any debris. Return to container and reuse, color will darken overtime. To freshen ash, bake ash over aluminum foil in oven at 350-400 for 30 minutes. Incense ash should last indefinitely.