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Signing UpStep 1Gather The Materials
There are very few materials needed for this Intstructable. These are listed below:
1 Highlighter (I got a pack of 4 different colors for only $1)
1 cup (plastic works best, so you don't have to worry about washing it out)
3 Tablespoons hot water
cotton swab
Pliers
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i need know one thing
the ink is visible under light of blue led?
i will test it out when i go back to my house!
i'm travel and i still conected!
heres a list of fuluorescent stuff by wikipedia
laundry detergents containing optical brighteners
soap
Body fluids (those are free)
sunscreen