As a type of direct dye, the best semi-permanent hair dye deposits color onto the hair shaft without penetrating the cuticle. Unlike permanent hair dye, semi-permanent dye does not require a developer and typically lasts for 4 to 6 weeks, gradually fading with each wash.
Semi-permanent hair dye is popular for its vibrant colors, ease of use, and ability to refresh or change hair color without long-term commitment. Its non-damaging formula makes it suitable for all hair types, including chemically treated or damaged hair. Originally developed in the early 20th century, semi-permanent hair dye has evolved to include a wide range of shades and formulations.