The listing, Invisible Ink Powder has ended.
This is pretty cool stuff. This package has never been open. It has all the instructions. You mix some of the powder with a little bit of water. You can use a q tip or paint brush to write what you would like no one to see. To make the Ink visible you hold the paper written on over something that produces heat. Be careful not to hold the paper to close, that it starts on fire. Any questions, feel free to ask!