Invisible ink with lemon juice

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  • Publicado : 13 de marzo de 2012
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INTRODUCTION
Making invisible ink is a lot of fun; you can pretend you are a secret agent as you keep all your secret codes and messages hidden from others. All you need is some basic householdobjects and the hidden power of lemon juice.

HYPOTHESIS:
If you want to send a message confidant, as any secret agent, you must do the following.
If you apply lemon juice on paper, this will beinvisible. If you put the sheet on a hot, this secret is revealed.
This is an interesting method is through this experiment we will observe how it works; if you want to find out will have to check.WHAT YOU'LL NEED:

 Half a lemon
 Water
 Spoon
 Bowl
 Cotton bud
 White paper
 Lamp or other light bulb


INSTRUCTIONS:
Squeeze some lemon juice into the bowl and add a few drops ofwater.
Mix the water and lemon juice with the spoon.
Dip the cotton bud into the mixture and write a message onto the white paper.
Wait for the juice to dry so it becomes completely invisible.When you are ready to read your secret message or show it to someone else, heat the paper by holding it close to a light bulb.

OBJETIVE
Lemon juice contains acid and acid weakens paper. The acidremains on paper even when the juice or vinegar dries. When you hold the paper near the light bulb, the parties acid burn, acquiring a brown color, faster than the parties without the acid.
Lemon juiceis an organic substance that oxidizes and turns brown when heated. Diluting the lemon juice in water makes it very hard to notice when you apply it the paper, no one will be aware of its presenceuntil it is heated and the secret message is revealed. Other substances which work in the same way include orange juice, honey, milk, onion juice, vinegar and wine. Invisible ink can also be made usingchemical reactions or by viewing certain liquids under ultraviolet (UV) light.

CONCLUSION
Check the project objective. Making our hypothesis, we found that lemon juice is used more to make...
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