Invisible ink


Draw a secret picture with invisible ink.

Things needed:


  • 1 x Piece of paper
  • 1 x Lemon
  • 1 x Crayon

Tools and equipment

  • Paint brush
  • Knife 


  1. Very carefully slice a lemon in half with a knife.
  2. Squeeze the lemon juice into a small bowl.
  3. Dip the paintbrush into the lemon juice and paint a picture on the piece of paper.
  4. Leave the piece of paper to dry.
  5. Your picture will now be completely invisible.
  6. Rub the side of a wax crayon all over the piece of paper.
  7. Your secret painting will magically appear!


The lemon juice is an acid, which breaks down the surface of the paper. This change is invisible until you rub a crayon over the surface. 

Further ideas:

Perhaps you could write an invisible note to a friend, and get them to reveal what is written by using their crayon.

Don't forget to share a picture or video of your creation on our Facebook page, we'd love to see it.


Published in the June edition of Dartford Living magazine.