... areas: wood coloring, stamping materials, leather dyeing, plastic coating, printing ink, stationery, ink, metal, paint, eyeglasses, packaging paper, ... coloring8, shoe polish stain9, metal complex dyes for solvent-based inks10, a printing ink used for other paper or metal ... surface with a metal complex dyes (such as screen printing)11, lighting products, coloring metal complex dyesSecond, ...