How to make invisible ink

invisible-writingLearn how to make invisible ink from household materials and start writing your secret messages and symbols. This is very interesting science experiment so you will get a lot of fun.

Method 1 – Using Lemon juice
two lemons

Required Materials


  1. Cut a lemon into two pieces and squeeze their juice into a cup
  2. Add few drops of water into lemon juice and mix it well.
  3. Dip a cotton swap into the mixture of water and juice and start writing your secret message on a white paper
  4. Allow your message to dry completely

When the paper dries the message will disappear. When it is time to show your message just heat the paper with light bulb by holding it over the bulb.


Method 2- Using Baking Soda

Required Materials

  • Baking Soda
  • Cotton swap or fountain pen
  • Grape Juice


  1. Put 2 spoonful of baking soda into the cup and pour warm water enough to make saturated solution.
  2. Dip the cotton swap (or use fountain pen) into the solution that you made and start writing message on white paper.
  3. When you finish writing your message let the paper dry until there is no sign of your message (you can dry it on sunlight).

When you want your message to be visible than dip any drawing brush into Grape juice and start painting it on your message


Abdul Wahab, "How to make invisible ink," in science4fun - Learn Science with Experiments and Topics, March 23, 2018,

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