CHI Deep Brilliance Hair Color uses 100% ammonia-free technology to create beautiful hair color for up to 6 weeks in just 25 minutes! Infused with pure natural silk and olive oil, hair is conditioned and protected during the process, providing rich, vibrant and long lasting color results. CHI Deep Brilliance Hair Color is the most reliable way for you to achieve perfect color results every time with absouluty no guess work. It works on all types or hair textures and even provides full coverage on the most resistant gray hair.