What is the Brunette Kit for Kativa Brazilian Straightening?What it does: A straightening treatment free of formaldehyde that is especially suggested for dark hair. expert outcome for a maximum of 12 weeks. Together with the moisturizing properties of organic coconut oil and the antioxidant power of açaí oil, its straightening recipe, which contains glyoxylic, vegetable keratin, and amino acids, leaves hair feeling soft, lustrous, and naturally moving.What more you should be aware of: Black, dark brown, brown, light brown, and chocolate hair (color levels 1, 3, 4, 5, and 5.35) with balayage-style color patterns, highlights, and lighting, among other things, are suggested for dark hair.