Turn the cold water on in a sink or spigot faucet. Measure one gallon of water using an empty and clean discarded milk jug. Fill the bucket with one gallon of water.
Pull on a pair of safety gloves. Pour one pound of ammonium phosphate into the bucket of cold water. Allow one to five minutes for the ammonium phosphate to dissipate. Ammonium phosphate is non-flammable, non-toxic and is available for purchase online or at any chemistry or hobby store.
Submerge the cloth in the bucket. Soak the cloth for at least five minutes. Pull the cloth from the water and pin the cloth onto a clothes line until it is completely dry. Repeat this process for other materials you wish to fireproof. Ammonium phosphate provides a fire retardant shield to any cloth material.