Metallic dyes derive their color from "metallic salts." They are commonly used in hair color products designed for men, to gradually change hair color over several applications. This gradual quality makes these products appealing to men who don't want an obvious, instant color change.

Is metallic dye bad for your hair?

Metallic salts: Some are benign and and some are extremely dangerous and cause extreme harm to hair if they interact with certain substances that on their own would not cause this effect. The most dangerous of these metallic salts are: copper, silver nitrate, silver, bismuth, or lead.

Is metallic hair dye good?

The main benefit of the metallic hair coloring technique is a play of shades. The colors literally shine, changing in their undertones depending on the lighting. This makes the hair tones look like real precious metals – iridescent, bright and bewitching – and it's impossible to look away!