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Interactive video lesson plan for: How to Make Disappearing Ink

Activity overview:

Nutella Bread Recipe:

Watch more How to Do Fun Tech & Science Projects videos:

Write secret messages or create a great magic trick with disappearing ink.

Step 1: Pour ethyl alcohol in bowl
Put on your safety goggles and pour the ethyl alcohol into a bowl.

Step 2: Add thymolpthalein and water
Mix in the thymolphthalein until it dissolves. Add the 900 milliliters of water, and stir.

Replace the thymolphthalein with phenolphthalein to make red disappearing ink instead of blue.

Step 3: Mix in molar sodium hydroxide
Mix in the 3-molar sodium hydroxide. You now have blue disappearing ink.

Step 4: Wash hands
Wash your hands with soap and water.

If skin contact occurs, rinse the area with water. Never squirt the disappearing ink onto someone’s face or near eyes.

Step 5: Test ink
Pour the ink into a squirt bottle and test it by squirting the ink on a white cloth.

Step 6: Watch ink disappear
Watch the ink disappear as it dries. Wet a cotton ball with ammonia and rub the area to make the ink reappear.

The color will vanish more quickly if you pour a little vinegar on it or if you blow on the spot.

Step 7: Store in a container
Store the ink in the squirt bottle to reuse.

Did You Know?
Did you know? In 2006, 40 percent of 26- to 40-year-olds had at least one tattoo.

Tagged under: disappearing ink,ink,science,writing,sescret message

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