One is a not burned, and do not leave a bit ash paper. Approach is: nitrocellulose, i.e.HNO3 + Cotton (nitrocellulose burn No. But first, do not burn, nitrocellulose not burningexplode!) The nitrocellulose with alcohol, dissolve (nitrocellulose and alcohol ratio of no more than 1:4), use it to ordinary thin paper soaked, bubble half a minute, and then remove and white, dry, can burn, burn lost, a bit ash also won’t leave. Because burn faster, it will not ignite flammable.