Making invisible ink

Making invisible ink from lemon

Entertaining experiment To conduct the experiment you will need: half a lemon, cotton wool, a match, a cup of water, a sheet of paper.

Squeeze the juice from the lemon into a cup and add the same amount of water.

Dip a match or a toothpick with cotton wool wrapped in it in a solution of lemon juice and water and write something on paper with this match.

When the “ink” is dry, heat the paper over the turned on table lamp. Previously invisible words will appear on paper.