What is another name for metallic dye in haircoloring?

Metallic dye is commonly referred to as gradual dye in hair coloring. This type of dye contains metallic salts that react with the hair and develop color gradually over time, often requiring multiple applications to achieve the desired shade. Gradual dyes are typically applied to darken hair color, enhancing the natural tones or adding subtle highlights without the commitment of more permanent color options.

Unlike other types of hair coloring products, which may offer instantaneous results, gradual dyes allow for a more controlled and less damaging process since they can be applied periodically and often lead to less abrupt color changes. This concept distinguishes it as an appropriate term for describing metallic dyes in the context of hair coloring.