This is a set of 7 luminous colors paint which glows in the dark, it's a high-grade GID Acrylic water based paint. It charged by UV rays. The colors do not last as long as the glow itself, after a while, the color fades to a white, then it continues to glow white until it runs out of charge. The Green has the longest lasting color and glow time, lasts green about 30min-2hrs, then fades to white and fades out completely over the next 2-4hrs.
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About colors: Aqua holds its color for about 1-2hrs, and its white glow time is about 6hrs. Blue is also a strong color, average glow time down to 0 is about 4-6hrs. Lilac - is the hardest color to charge, in order to get a true purple need to mix a number of crystal variants. The more pigment you use the stronger the color. When Lilac is fully charged, look closely & you'll see speckles. Average glow time to 0 is about 3-5hrs. This color is classed as a medium glow and needs a strong UV to charge.
The next range of colors is classed as complicated to use and have short glow times. All of these colors require UV Blacklight to charge and hold their color because they need an extra UV to charge them. These colors are normally used in the creation of Cosmic Star Ceilings. White glows white but can also glow a white-blue color, it has a short glow time of 3-4hrs and is not like the other colors. Orange shows well under UV Blacklight, but has an average glow time of 2-3hrs and a short color glow time. Red has a very short glow time, designed specifically for flash work in the creation of Cosmic Star Ceilings. His glow time is generally a very short, up to 30min