Which type of hair color is designed for maximum grey coverage?

Permanent hair color is specifically formulated to provide maximum grey coverage due to its ability to penetrate the hair shaft and alter the natural pigment. The chemical composition of permanent hair color involves a developer (usually containing hydrogen peroxide) that opens the hair cuticle, allowing the color molecules to enter and bond with the hair. This process enables the color to last longer and cover grey strands effectively, making it ideal for clients seeking to cover grey hair completely.

In contrast, semi-permanent hair color and temporary hair color do not offer the same level of grey coverage. Semi-permanent hair color tends to fade with each wash and does not fully penetrate the hair shaft, making it less reliable for those with significant grey hair. Temporary hair color, designed for quick application and easy wash-out, typically coats the hair surface but does not provide long-lasting or comprehensive coverage, especially for grey hair.

Highlighting color is primarily used to add lighter shades to the hair, rather than covering it. While it may blend with grey, it does not achieve full coverage like permanent hair color does. Therefore, the choice of permanent hair color is the best option for individuals looking to ensure their grey hair is effectively concealed.