100 ml / 3,4 oz refill of invisible Stealth Ink
- invisible when applied
-appears after contact with UV rays -- turns into dark brown / black shade
- super long lifespam -- almost impossible to buff!
- comes in resistant bottle with injection cap to prevent mess during refills !
Invisible Stealth Ink formula is enhances by the UV rays - best by sunshine or any other light.
The more your mark is exposed to UV rays, the darker it gets.
Direct sunshine works the best, subway lights takes longer - same with summer and winter condition.