×
Back left 6d79ffa2165c70419b5d81367025d889a832b878a14a24f303dd5f6f59a4f2c5
Back right 7131bbac0729874ea35f73598ddf94d2e1f7db07d23b55f12e0a2064353ff6d7

Making Invisible Ink Appear

SHARE IT!
LIKE IT!
kids articles

Invisible ink isn't just something you see in James Bond movies or X-Files re-runs. Even Harriet the Spy has her own invisible ink pens. In fact, prisoners of war used their own sweat and saliva as invisible ink.

The way invisible ink works depends on the method used to make it. There are several ways to make invisible ink and below you will find a few different recipes for making your own invisible ink and how it works.

Invisible Ink the Baking Soda Way

Mix about 1/4 cup (60 ml) of baking soda and 1/4 cup (60 ml) of water. Next, write using a Q-tip, toothpick or brush on a piece of paper. Let it dry completely. To read the secret message, paint grape juice concentrate across the paper with a paint brush or a sponge. Don't forget - grape juice stains.
Why it works: Grape juice has an acid that reacts with the baking soda. A different color appears wherever the secret message is written.

Invisible Ink the Milky Way

Put a little milk in a small bowl. Write with the milk on a piece of paper with a Q-tip or a brush. Let your message dry completely. To read the message just heat the paper. Use an iron or 100-watt light bulb or stove element. Don't rest the paper on the bulb. Ask an adult to help in case a fire starts and never use a halogen light.
Why it works: Milk is an organic product which means it comes from a living thing. When it's heated, it burns at a slower rate than the paper. Your invisible message shows up brown.

Invisible Ink the Lemon Way

This works the same way as the Milky Way. Simply dab a Q-tip or brush into a bowl of lemon juice and write away. Just make sure you don't use too much. To see the message, simply heat the paper after it dries. Another way to see the message is put salt on the drying ink. Give it a minute and then wipe the salt off. Use a wax crayon to color over the message.
Why it works: Both lemon juice and milk are mildly acidic and acid weakens paper. The acid remains in the paper after the juice or milk has dried. When the paper is held near heat the acidic parts of the paper burn or turn brown before the rest of the paper does.

These are only a few ways to make invisible ink. Using the same heat method, you can also use white wine, vinegar, apple juice, and even orange juice, to name just a few. Try some other fruit juices to see what works.

Do you have your own recipe for making invisible ink? What works best? Let us in on your secret.

Related Stories:

News Feed

To view your full News Feed please Login using your Username and Password or Register with Kidzworld!

Forum Activity

Role play anyone? Open one ... in General Roleplays posted by Iheart2heart4eva
Role play anyone? Open one ... in General Roleplays posted by Carters
type whatever comes 2 your ... in Forum Games posted by Abbergrl
Would u date the person abo... in Random posted by Abbergrl
Are You Like Lady Gaga? in Celebs posted by deepke
Are You Like Lady Gaga? in Celebs posted by aasih
Are You Like Lady Gaga? in Celebs posted by aasih
Are You Like Lady Gaga? in Celebs posted by aasih
Are You Like Lady Gaga? in Celebs posted by aasih
Are You Like Lady Gaga? in Celebs posted by aasih
Sillyvision next Generation... in General Roleplays posted by Tord_Trash
Are You Like Lady Gaga? in Celebs posted by aasih
See you... **NOT CLICKBAIT** in Random posted by XxRuby_PhoenixxX
What do you think i am?(hon... in Say Anything posted by ImagineOrdinary
♥A Miraculous Child♥ ATJ ♥... in General Roleplays posted by aasih
New site layout this week! in New Features on KW posted by SnowflakeAngelKitten
Write your best friend's na... in Say Anything posted by slurpie3
Tell A Story - One Word Per... in Forum Games posted by rainbowpoptart
Would u date the person abo... in Random posted by dragongirl555
Fragments [INDIGO LEAGUE!] ... in Private Roleplay posted by SnowflakeAngelKitten
New site layout this week! in New Features on KW posted by slurpie3
New site layout this week! in New Features on KW posted by James
New site layout this week! in New Features on KW posted by SnowflakeAngelKitten
New site layout this week! in New Features on KW posted by rainbowpoptart
New site layout this week! in New Features on KW posted by simran88
New site layout this week! in New Features on KW posted by Abbergrl
New site layout this week! in New Features on KW posted by SnowflakeAngelKitten
what do you want to be when... in Current Events posted by Alois_Trancy_
New Real Time Private Messa... in New Features on KW posted by lolathedog
New Real Time Private Messa... in New Features on KW posted by Abbergrl
Would u date the person abo... in Random posted by Abbergrl
Would u date the person abo... in Random posted by FlutePlayer197
Would you happen to have th... in Say Anything posted by MechaMaiden23
Choose a word to describe y... in Random posted by MechaMaiden23
Would u date the person abo... in Random posted by dragongirl555
See you... **NOT CLICKBAIT** in Random posted by ImagineOrdinary
See you... **NOT CLICKBAIT** in Random posted by rainbowpoptart
See you... **NOT CLICKBAIT** in Random posted by snoopynwoodstock123
If Net Neutrality Passes ;-; in Random posted by gpc78
See you... **NOT CLICKBAIT** in Random posted by gpc78

Poll

F1064607607312
1

Who's Your Favorite Spy?