Invisible Ink – Chemistry with Young Children

Author: Vera KoesterORCID iD

The brief video shows and explains the chemistry behind the browning of lemon juice upon heating, thereby revealing a secret message.



Vitamin C – wie ein Apfel nicht (so schnell) braun wird, Agnes-Pockels-SchülerInnen-Labor, TU Braunschweig, Germany, 2017. (accessed November 18, 2023)

Sonali S. Bharate, Sandip B. Bharate, Non-enzymatic browning in citrus juice: chemical markers, their detection and ways to improve product quality, J. Food Sci. Technol. 2014, 51(10),  2271–2288.

Also of Interest



Leave a Reply

Kindly review our community guidelines before leaving a comment.

Your email address will not be published. Required fields are marked *