The present invention relates to a mordant for hair dyeing and a hair dyeing product comprising the mordant. The mordant of the present invention comprises an effective amount of a ferrous salt, antioxidant and water the hair dyeing product of the present invention comprises three parts: a softening agent, a dyeing agent, and the mordant. The mordant and the hair dyeing product comprising the mordant as provided by the present invention do not contain thioglycolic acid, aromatic compounds such as p-phenylenediamine and hydrogen peroxide, and are safe and free of irritation. The hair dyeing product of the present invention has good chromaticity and fastness as well as good product stability and convenience in usage.本発明は、染毛用媒染剤及びその媒染剤を含んだ染毛製品に関する。本発明の媒染剤は、有効量の第一鉄塩、酸化防止剤、及び、水を含む。本発明の染毛製品は、柔軟剤、染色剤、及び、媒染剤の3つの部分を含む。本発明の媒染剤およびその媒染剤を含む染毛製品は、チオグリコール酸、芳香族化合物(例えば、p-フェニレンジアミン)、および、過酸化水素を含んでいないため、安全で、刺激性もなく、発がんの恐れもない。本発明の染毛製品は、色度、及び、堅牢度に優れ、かつ、安定性及び使用に際の利便性を備えている。
