When you get right down to it, there are a lot of substances that can be used as invisible ink. Some invisible inks work by causing slight damage to the paper, so that heating the paper burns the weakened areas to make the writing appear. For other invisible ink, you can write with a chemical that is invisible by itself, but which becomes visible when a second chemical is applied. Here are how-to's for some easy-to-make invisible inks:
You can even make ink that is invisible until it is held under a black (ultraviolet) light. If you have a black light, try writing a secret message using kerosene as an ink.
You can even make ink that is invisible until it is held under a black (ultraviolet) light. If you have a black light, try writing a secret message using kerosene as an ink.

Comments
I am doing a science fair project on invisible ink and i want to thank you for posting it on the web.
-Becca
im doing a project on invisible ink and this info really helps!!! thanks!!!!!!!
I am doing a scince fair project and this is perfect! Thanks for posting this on the web!
thanks alot for posting this..the nformation is very helpful for my up coming science fair
Hey! Thanks for posting this, it really helps when you have no idea what to do for a project. Thanks!
THANK YOU, THANK YOU, THANK YOU OMG, LOL, JJB, ABC, MSA, HSA
Miss Anne, I am a magician and would like to know how to make disappearing ink. Sold in small bottles at novelty stores. Problem is sometimes we buy plain water instead of ink as the ink due to long storage has changed into water. If only I could make it myself. Thanks. Best wishes! Mister Lie
WOW!!!!!!! IT SOUNDS A LOT OF FUN MY SON HAS A SCIENCE FAIR PROJECT DUE AND I THINK THIS WILL BE A WINNER THANKS FOR ALL THE HELP IN MY TIME OF NEED:)
Thankyou verymuch
thanks for the great idea!!!!
THANK YOU THANK YOU THANK YOU!!! THIS IS SUCH AMAZING NEWS!!! I’LL BE SURE TO USE IT!!!
Thanks very excited. i hope to win.
im am doind a science fair project and i watn to thank u for all the help and info u gave me
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