Permanent black dye fades primarily through washing, heat, and UV exposure. To keep the shade deep and even: wash with a sulfate-free shampoo formulated for color-treated hair — sulfates strip both natural oils and dye molecules faster. Rinse with cool or lukewarm water; hot water opens the cuticle and accelerates color loss. After each wash, apply a conditioner or mask to the lengths and ends; the keratin and vitamin complex in the provided fixing balm are designed for post-color use, but you can repeat a similar conditioning step weekly to maintain smoothness and shine. Limit heat styling (flat irons, curling wands, high-heat blow-drying) and always use a heat protectant when you do style. UV light oxidizes black pigment, so wear a hat or use a leave-in product with UV filters during prolonged sun exposure. Schedule root touch-ups only on new growth — avoid overlapping previously colored lengths to prevent buildup and excessive dryness. If the ends look dull between colorings, a color-depositing conditioner in a cool black tone can refresh the shade without a full chemical process.
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