Lilac Large Crystal Glow in The Dark Sand, Space Dust 1-2 ml- 4oz Packet Daytime "Invisible" ProFX Glow in the Dark Acrylic water based SAND SIZED pigments that glow brightly in the dark. Lilac, strontium based rare earth element these pigments are NON TOXIC , have the brightest longest glowing times available. Approx size 1-2ml This versatile Glow in the Dark pigments are made from the purest product available and has a glow life span of over 10 years. What makes our pigments glow brightly is our crystal formation, just like small batteries they charge and discharge their energy. UV rays from Sunlight or even Black Light UV will supercharge this paint, incandescent and LED takes a little longer. We have everything from super fine to a coarse sand. All ProFX pigments are structurally designed to be mixed with clear mediums, Acrylic, Epoxy, Glues and even Slimes . Do not mix other types of colored paint as this will stop the crystals from charging and emitting their glow. We do sell our airbrush and thinning medium through our Amazon store. Proudly made & packaged in the USA with over 15 years producing UV and GDI paints and pigments, GloMania a name you can trust and rely on. Never short of Stock as we manufacture. FREE shipping, ship out same day, and 100% guarantee all our products.