A 6.
Sky lanterns are made up of a biodegradable paper with a lantern. The compounds
that make up the fuel in the lantern are Ethanol, Stearic Acid, Paraffin, Sodium
Hydroxide and Water. This is a non-toxic, white, strong firepower, new green fuel.
The lanterns are non-volatile and have a long shelf life of over 6 years.