... crystal powder.Average particle size range: 20~25um.Luminous color: Red.Free of dangerous, toxic, heavy metals, radiation. Friendly to ... . Fast charging, excellent associativity.Dosage range: 5~50% by weight according to application.Sample order quantity: 1kg.(Packed by vinyl ... glow in yellow-green, blue-green, sky-blue, blue-purple, red, orange, etc.)2. Glow in the dark plastic products: printing ...