GLOW-IN-THE-DARK PIGMENTS
Not all GID pigments glow with the same intensity & for the same length of time. The intensity is based on the wavelength the color gives off.
Yellow, green, white, aqua: glow the brightest and longest
Red, orange, pink, blue, violet, purple: less bright and shorter glow time as they are on the ends of the visible color spectrum
Particle size of the pigment can also impact the glow. A finer pigment will result in a less grainy glow; however it may not glow as bright compared to a larger particle size. Would you rather have a smoother glow or a brighter glow? Use of other pigments in tandem, such as shimmers and glitters, can also make the glow look more grainy or speckled.
•Light source used to “charge” GID pigments glow also impacts strength. Using UV/LED light will result in a stronger glow than incandescent lighting and sunlight, especially for colors on the end of the color spectrum.