What was ancient roman hair dye made of?

A mix of animal fat andbeechwoodash was used for red dye.Saffronwas used for gold/blond dye. Leeches fermented invinegarfor 40 days were suggested for black dye. Henna was also used. Dyes were applied throughpowders, gels and bleach. Dyes were popular among women, but whenappliedfrequently, they made the hair weaker. Christianwriter Tertullian wrote about how dyes were harmful for theheadand how they burnt the scalp.