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Making Invisible Ink Appear

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.

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Who's Your Favorite Spy?

  • Harriet the Spy.
  • The SPY Kids.
  • James Bond.
  • Agent Cody Banks.

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crystallgirl
crystallgirl posted in Random:
I'm not bisexual so no
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Torixx_1
Torixx_1 posted in Random:
Yes I cos I want tacos n chocolate
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snoopynwoodstock123
Prologue 0-2: Hello, Sister Despair   The corridor seemed to wind on and on as I walked; I'd passed so many classrooms that the tedious environment I found myself in felt circular. I'd seen no-one, heard no-one... it felt lonely. I felt lonely. Though I desperately wanted to call out to see if someone would answer me, I felt that no answer would come. Maybe... all of this was completely hopeless. However, that feeling of solitude was broken by the most grating, irritating, aggravatingly-sickly voice I'd ever heard. "Hello! Are you new, too?"   Well, it was better than nobody. As I turned to the source of the voice, a smallish girl with pale pink curls greeted me with a smile, giggling happily. Somehow... I felt I recognised her, in some way. She had a friendly air about her, so maybe I could trust her. "Yay!" she began, striking a cute pose, "Ruka found someone else, nya!" Ugh. She reminded me of those god-annoying anime characters who were a bubbly mess of energy. I couldn't just ignore her, despite how badly she grinded my gears. A patient smile forming on my face, I couldn't help but stammer out of nerves.   "S-so, who are you?" I asked flatly, "I'm Misaki Yami, if you really wanna know." Judging by her speech pattern, this girl was probably called 'Ruka', but it was  best to make sure; I didn't want to call her a name that she wasn't called. "Ahh! So cute, nya!" she continued cheerily, "I'm gonna call you Aki! A cute name for a cute girl, nya!" "You really don't have t-" I was promptly cut off by the girl again. She was really starting to irritate me now, but I couldn't blow a fuse because of her. "I'm sorry! I need to introduce myself, too!" the girl swiftly struck a cute pose. "I'm Ruka Arisugawa, but I might be better-known as Faris, nya."   RUKA ARISUGAWA SECONDARY INTERNET IDOL   Ah. So that's how I knew her... Ruka Arisugawa - better known as Faris Nekomimi - is pretty much inescapable online. Youtube videos, blogs, social media in general are overrun by the talented internet idol. I'm not really into that kinda thing, but from my love of anime, I guess they assumed I liked idols too. I don't. Well, I couldn't just be rude, even if she did seem to embody that irritating bubbly attitude I'd never grown to like. So, after a little more conversation (though it wasn't particularly interesting), Ruka and I began to make our way to the gymnasium; according to my acquaintance, she'd seen some others walking around and decided to take their path.    Soon enough, after what seemed like hours of walking in circles, we'd reached the door to the gymnasium- and as Ruka had said, there were others making their way inside. I cautiously pushed open the grey door, and inside the rather generic-looking gymnasium, stood around fourteen other people. They all looked pretty unique, but what was I expecting? These were former Ultimates... they definitely had that air about them. Ruka was quick to dash forward and start talking to people, and I began to settle on that idea, too. The people in the room had settled into two groups; I concluded on talking to the people in the first of those groups.   Well... you can't just say nothing, I told myself sharply, as I took my steps towards the first person in the group. Go ahead and introduce yourself to them.
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MajorGamer11
MajorGamer11 posted in Random:
"If light is in your heart, you will find your way home." - Rumi " Shine like the whole universe is yours." - Rumi
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crystallgirl
crystallgirl posted in Random:
Lives
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