... yellow-green , blue-green 2.luminous pigment 3.Afterglow time: 20hr 4.Material: rare earth metal 5.high self l Luminous Powder/pigmentIntroduction ... medium, such as paint, screen printing, plastic, glass, coating, powder coating, ink, enamel, ceramic and fiber.Indication position:Can be ... min mcd/m2≥Median Size(um) HK Series(yellow-green)HK-200A550±20200±10100±555-75HK-300A400±20160±1070±540 ...