Non permanent hair dye, also known as temporary or semi-permanent hair color, is a type of dye that does not penetrate the hair shaft, unlike permanent hair dye. It provides a temporary color change that typically lasts for a few washes, effectively "coating" the hair rather than altering its structure.
Non permanent hair dye is ideal for those seeking a subtle color change or who wish to experiment with different shades without committing to a long-term alteration. Its benefits include ease of application, affordability, and the absence of damaging chemicals. Historically, henna was one of the earliest forms of non permanent hair dye, used for centuries to add color and shine.