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Now you see it, now you don't! Team up with the science sleuths of A-TV to make your own invisible ink.

baking soda
paper
water
light bulb and light
cotton swabs
paint brush
measuring cup
grape juice concentrate

REMEMBER THAT YOU SHOULD ALWAYS WORK UNDER ADULT SUPERVISION WHENEVER YOU CONDUCT EXPERIMENTS. SO PLEASE DON'T DO THESE PROJECTS ALONE.

  1. To create your ink, add 1/2 cup of water to 1/2 cup of baking soda and mix it up really well.
  2. Use your cotton swab as your pen. Write a message or two, and remember that you must let your ink dry completely (for about 10 minutes) before you try to reveal your secret letters with the “visible-izer.”
  3. There are 2 ways that you can reveal your secret messages. The first way is by painting over your paper with grape juice concentrate. The juice has an acid in it that reacts with the baking soda, so a different color appears wherever the baking soda mixture is.
  4. You can also reveal your secret messages by holding your note up to a light bulb. When the baking soda gets warm it will turn brown and so will the letters on your piece of paper!


Rate This Activity

Reviews

it's really cool when my bff comes over we act like she is a criminal ...

Aspen, 8, Saltvill VA

this was soo cool!!!

Leonardo, 12, Cedar Hill TEXAS

this is so fun and i might do this for my science fair project

Leo, 12, Cedar Hill TX

wow this is so secret i pretend to be a spy when i use it

Julia, 7, Lincoln NE

i did dis and gave it to my bestie and she laughed

Ariana, 12, New York NY

Thank you so much the first time I tried it I didnt let it dry long en...

Courtney, 9, Sioux Center IA

i am trying it now!!!!!

Kyra, 9, Eagle County CO

that was relly good

Elizabeth, 10, Miami FL


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