You can use this as real ink by using it BEFORE you combine them together like this: dip a toothpick into the first solution (sodium ferrocyanide solution) and with the tip write onto a sheet of paper.
While the writing is drying, dip a piece of paper towel int other solution (ferric ammonium sulfate solution) and gently blot along where you wrote on the paper… and the color appears as blue ink. You can make your secret message disappear by wiping a paper towel dipped in a sodium carbonate solution.
You can also grow purple, gold, and red crystals with these chemicals… we’ll show you how!
Materials:
- sodium ferrocyanide
- ferric ammonium sulfate
- 2 test tubes
- distilled water
- goggles and gloves
- water
You bet! Take a look at the instructions on the top of the page. However, this ink won’t dry as fast as ink from a pen.
does it really work as ink?
I couldn’t find the Sodium Ferrocyanide anywhere in stock, but found that online Potassium Ferrocyanide can be used interchangeably. Is this true for this project? Thank you!