What It Does As Gibson points out, demi-permanent dye consists of small levels of peroxide to allow the color to penetrate the shaft to an extent, but with out ammonia. The ammonia-free components makes it gentler on the hair than permanent dye, but a lot less long-lasting. Frequency: The frequency https://damienfsair.empirewiki.com/9356709/5_simple_techniques_for_shades_of_q_hair_color