The study and development of permanent hair dyeing, agent especially about the new harmless ones such as iron salt, plant extracting and Melanin hair dyeing agent are reviewed.

• 综述了永久性染发剂的研究开发,尤其新型无毒染发剂如铁盐染发剂,植物萃取物染发剂和黑色素类染发剂等。