This ink is clear in normal light but glows under black light (UV). It can be sprayed over a black ink tattoo while the stencil is still on and under a UV light the tattoo will appear electric blue in colour. Our airbrush temporary tattoo ink is made in Australia from safe cosmetic based ingredients. The ink is ready to use straight from the bottle without further diluting. It is best to lightly spray the coats of colour to build up to the desired intensity rather than to spray it too heavily all at once. To clean your airbrush and jars use alcohol such as isopropyl alcohol or methylated spirits. Tattoos last better on skin that has been first wiped with rubbing alcohol (such as Isocol). Yellow and fluoro colours are naturally transparent so it is advised to spray a white base before spraying these. Avoid contact with eyes and mouth.