Making invisible ink

I am making an ink which is visible only under UV light. Pyranine is faintly blue under acidic conditions but it still has it's fluorescence.

[Dreading.]

I knew this just had to be created by a Gravity Falls fan ! 🤣🤣

[spongebar]

After giving citric acid, was it given isopropanol? Can we substitute ingredients other than isopropanol?

[mlv]

Interesting video, it seems so easy it's almost unfair

[redrrr]

Can you make such ink that can be seen only by wearing glasses?

[vLife]

can these glow in different colors given the same lamp?

[janbrauze]

Pretty cool thing, can you make ink that appears when gets heated up?

[ryanschmitt]

gum arabic can be used as a thickening agent

[markvincentabenir]

Now draw it in a journal with eldritch horrors in it nd the info

[copperchopper]

maybe you can change the viscosity by changing amount of acid or dye

[copperchopper]

can I use boric acid? where did you get the dye from?

[matthewstern]

I need the actual amounts grams how much did you use of each?