volume or weight of contents : black 10g + black 10g product main specifications : all types expiration date (or period of use after opening) : 3 years before release how to use : apply the solu more→tion to gray hair and gray hair with a brush, dry for 3 to 5 minutes, and then go out without shampoo. ingredients : purified water, ethanol, benzyl alcohol, isopropyl alcohol, vp/va copolymer, methylpyrrolidone, hydroxyethyl cellulose, black no. 401, lactic acid, orange no. 205, citric acid, red no. 227, rice extract, soybean extract, sesame extract, butyl len glycol, blue no. 1, 1,2-hexanediol, sorghum root extract, purslane extract, angelica root extract, foot root extract, thief's cane