Dyeing hair is a common practice that has been used for centuries to change hair color. But should you dye your hair when it's clean or dirty? This is a question that has been debated for years, and there is no one-size-fits-all answer. The best way to decide whether to dye your hair clean or dirty depends on your individual hair type and the desired results.
In general, dyeing clean hair will result in more vibrant and long-lasting color. This is because the hair cuticles are open when the hair is clean, which allows the dye to penetrate more deeply. However, dyeing dirty hair can help to protect the hair from damage. The natural oils on the hair can act as a barrier between the dye and the hair shaft, which can help to prevent the hair from becoming dry and brittle. Additionally, dyeing dirty hair can help to blend gray hair more effectively.