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Egg Graffiti

Etch your initials or a drawing on an ordinary egg without breaking the shell.

What you’ll need

  • 1 hard-boiled egg
  • Crayons
  • Wide mouth jar
  • 1 cup of white vinegar
  • Water at room temperature
  • An old toothbrush

    • What you do

    1. After the hard-boiled egg cools down, draw on it with the crayons. You can create designs, write words, or just scribble. Be very careful not to crack the egg when you are writing on it.
    2. Put the egg into the jar and cover it with white vinegar.
    3. Let the egg stand in the vinegar for two hours and then pour out the vinegar and replace it with fresh vinegar.
    4. Let the egg stand in the fresh vinegar for another two hours, then take it out of the jar. Wash the egg and remove all the crayon marks. The eggshell may be very fragile, but your drawing or writing remains.

    What happened?

    The acid in the vinegar dissolves much of the calcium carbonate of the eggshell. The crayon however, acts as a protective barrier to the vinegar. The wax in the crayons protects the parts of the shell that you wrote on and keeps it from dissolving.
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