Saturday, 6 January 2018

Secret messages

In this science experiment the 4th graders became masters of steganography by preparing their own invisible ink. They used cotton swabs to write a massage onto white paper using baking soda and water solution as invisible ink. The recipients read the messages by holding the paper up to a heat source.

 By Agnieszka Drowanowska 
and Anna Dołżyńska 

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