Historically, spies have been known to secretly send messages using a wide variety of methods. Some of these messages are encrypted, readable only to those able to decipher them. Other messages are invisible to the naked eye. One such method is the ability to write messages inside of an egg. The egg seems normal on the outside, but will reveal a message when its shell is broken.
Place the egg in small saucepan.
Fill the saucepan with water and cover it with a lid. There should be at least one inch of water over the egg.
Place the saucepan on the stove and turn the heat on high.
Let the egg boil for 20 to 25 minutes.
Remove the saucepan from the fire and drain the water out carefully. Make sure you do not break the egg. It might help to detain the egg with a spoon to prevent it from falling into the sink.
Run cold water over the egg until it has cooled. This will allow you to touch it without being burned.
Place the alum and vinegar in a small bowl and stir with a spoon. Make sure the alum is completely dissolved into the vinegar.
Dip the paint brush into the solution and write a secret message on the egg's shell. It might be difficult to see what you are writing, so try to be as accurate as possible.
Let the solution permeate onto the inside of the egg by letting it dry. You can speed this process up by placing the egg under a bright light for 10 to 15 minutes.
Remove the shell from the egg and you will see your secret message written on the egg.
How to Mash Egg Yolks for Deviled Eggs
Can You Poach an Egg Without Vinegar?
How to Cook Pancakes With Eggs in the ...
How to Make an Egg Peeler
How to Cook a Hard Boiled Egg With a ...
What Is the Difference Between a Fried ...
How to Preserve a Hard Boiled Egg
How to Make a Mayonnaise Facial Mask
How to Make Glow in the Dark Eggs
How to Egg Wash a Loaf of Challah Bread
How Many Calories Are in a McDonald's ...
How to Replace Eggs With Mayonnaise
How to Store Cracked Eggs in ...
How to Make Eggs Over Easy
How to Cook Eggs Sunny Side Up Without ...
How Can I Tell If an Egg Is Hard-Boiled ...
How to Cook a Raw Egg in Instant Ramen
How to Cook Over-Easy Eggs in a ...
How to Make a White Decorator Icing
How to Keep Yolks in the Center of Hard ...
Based in El Paso, Texas, Anaid Heyd has been writing research articles since 2001. Her work has been published in the "American University Law Review." She has bachelor's degrees in political science and Chicano studies from the University of Texas at El Paso and is currently in law school at American University.
Hemera Technologies/Photos.com/Getty Images