Write secret messages or create a great magic trick with disappearing ink.
You will need
- Safety goggles
- 100 milliliters ethyl alcohol
- A bowl
- 1 gram thymolphthalein
- 900 milliliters of water
- 10 milliliters 3-molar
- sodium hydroxide
- Soap and water
- A squirt bottle
- A white cloth
- A cotton ball
- 1 gram phenolphthalein (optional)
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.
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.