- Transparent under visible light
- Can phosphor any colour
- Preferably a liquid, that can be put in a felt tip pen
- Over the counter ingredients would be best.
- Already tried washing powder
2007-02-03 21:48:25 · 2 answers · asked by nerd608 1 in Science & Mathematics ➔ Chemistry
Dissolve 200mG or greater quinine sulfate tablets (an anti-malarial agent available at many online drugstores) in water. Crush with six tablets per 50mL (around 2 ounces) water to start. Add a few drops of sulfuric acid (you can take a few out of a cell in a fully functional lead-acid car battery with an eyedropper if you do not have sulfuric available), test with your UV source as you add to see when additional acid does not intensify further. The ink dries to an invisible-in-sunlight state which shows up blue under UV.
2007-02-03 21:52:17 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You may want to keep experimenting around (the link below should give you some guidelines to help with that). The other two links may give you some specific ideas of what to try.
2007-02-11 15:49:33 · answer #2 · answered by jas 2 · 0⤊ 0⤋