Long Lasting Flourecent Pigment
Chromascent LL, a long lasting fluorescent pigment composition, contains rare earth metals in combination with alkali aluminates. It would re-emit visible light sustaining about 8~10 hours in dark space, after being exposed under sunlight or regular electric lamps for five to thirty minutes. The brightness is greater than 10 mcd/m2 normally. It may fluoresce continuously for about 72 hours till decaying brightness near 0.32 mcd/m2. Its stable non toxic composition may be used for twenty years or so. The product is safe.
