How to make invisible ink pen for secret messages

[@Capytinno]

I can make a book identical to the gravity falls one now, thanks! it will be a perfectly unique edition

[@OpalOctober13]

Thats what I'm doing!!

[@DarioC-137]

That’s exactly why I’m watching this, the ink in the pen I bought ran out

[@братмайн]

​@@DarioC-137hello from russia, im also doing this

[@KooperSalmo]

all you need is a blacklight to read the secret message any color highlighter will work its the secret oils in there that make it glow

[@chickin6816]

Basically you get the yellow out and the invisible oil

[@LanaJones_]

Gravity Falls fans, assemble

[@aubreighcampbell1091]

Thank you when your invisible ink runs out light charges up

[@MariaPosada-5111]

Can I do it with a marker?

[@jemariocaldwell8934]

Does all the highlighter stuff need to be out (ALL OF IT)

[@KooperSalmo]

Not all just squeeze it like i did like 6 times

[@jemariocaldwell8934]

@@KooperSalmo I have a thick highlighter not a thin one that's why I'm asking.

[@jameswilliams5104]

You can hide a phone number with pen

[@familyfamily90]

Thanks for this video

[@jemariocaldwell8934]

You earned a sub

[@gladyschewe1591]

Cool 🆒😎

[@chintuchintu513]

Does it work
Really

[@KooperSalmo]

Yes it does